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You've both had long-term relationships before - Contrary to what many people think, learning from long-term relationships that you had before can really help when you fall for someone new.

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You've both had long-term relationships before -

According to doctor Jacqui Gabb, you shouldn't shut the memories of your previous relationships away and forget about them. The study was carried out by the Open University, in the UK, involving interviews with 5,000 people conducted over a period of two years.

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You've both had long-term relationships before - It's best to learn from past relationships, so you can recognize warning signs when things are not going well, and learn to be attentive to your new partner's behavior.

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You met via dating apps - Many people may still have doubts about using apps like Tinder, but the truth is that these tools can be the key to starting a long-lasting relationship.

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You met via dating apps - A study published by the Proceedings of the National Academy of Sciences journal, discovered that couples who met online, instead of at work or in nightclubs, were happier and more likely to stay together.

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You met via dating apps - Researchers in the US discovered that over a third (35%) of couples who got married from 2005 to 2012 met online. Of this number, 45% used dating sites and 21% met on social media.

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You don't post couple photos online - Another study carried out in the US revealed that couples who didn't constantly post photos together online were happier.

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You don't post couple photos online - This is because the couple feels secure in their relationship and doesn't need to have it validated by others.

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You don't post couple photos online - Many people who frequently post photos together aren't actually that happy with each other in real life.

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You watch series together - If you've spent a whole weekend watching programs and get into the habit of watching a TV series together, this is a good thing.

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You watch series together - Don't be worried if your social life is not really busy. Watching shows together is good for strengthening your relationship.

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You watch series together - According to a study by the University of Aberdeen, this type of activity improves the quality time that the two of you spend together. It's just not worth falling out over spoilers!

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You compliment each other - When you're in a long-term relationship, you sometimes forget to compliment your partner and it could seem forced when you do so.

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You compliment each other - A study by the Open University also noted that compliments and displays of appreciation between partners helped keep a relationship healthy.

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You compliment each other - Making sure you show a natural form of respect and admiration for your partner will make you both happy and proud of each other.

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You make love once a week - Happiness in a relationship is not measured by the amount of times you make love in a short period of time (in a week, for instance).

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You make love once a week - So don't worry about whether you're making too much love or too little. Just do what works for you both, and go with the flow!

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You make love once a week - According to a study by the University of Toronto, however, it's best to make love once a week.

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You don't have kids - This is a controversial sign of a happy relationship. However, a survey by the Open University, UK, stated that couples without children are happier.

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You don't have kids - Couples who don't have kids or teenagers to look after are much happier with their partners, feel more mutually valued, and have more time for each other.

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You don't have kids - But researchers also discovered that women who didn't have children were less happy generally in life, compared to mothers, who were happier than any other group, even if their relationships were not the strongest.

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You don't have kids - But you don't have to give up having kids to have a happy relationship. If one of you has a dream of starting a family, it's important to talk about this with your partner.

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You don't have kids -

If you're both prepared to take this step in your relationship, then go for it. The decision to have kids can be one of the most unifying and strengthening parts of a relationship!

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