Researchers quizzed 2,000 people to reveal the top 50 things which indicate a couple are past the 'seeing each other' phase.Posting a 'loved-up' photo on Facebook, changing your status to 'in a relationship' and being introduced to wider friendships circles also show couples are the 'real deal.'Meeting potential in-laws, staying overnight and divulging salary details also show trust and growing love for a partner.Couples are usually together for just over five months before they deem the relationship to be 'serious'.The study also highlighted that couples deem a relationship more serious when they get more comfortable with each other - which means seeing each other without make up, showering together, lounging around the house in pyjamas and even discussing intimate health issues.Other signs that couples are committed to their other half include sharing private details such as pin numbers and passwords.Sending good morning and good night texts, frequently saying 'I love you' and posting lovey-dovey pictures of the two of them on Facebook also made the list.Other relationship milestones include meeting the parents, becoming the 'plus one' on all invites, seeing each other through an illness and comfortably phoning each other at work.While others will show how serious they are by buying a dog or cat together, choosing their partner's favourite foods in the weekly food shop and sharing their friends secrets.Eight out of 10 people firmly believe that when it comes to keeping a partner happy, actions speak far louder than words.Which is why many couples would prefer for their partner to make smaller gestures such as watching TV shows they like or listening to the same music.The study also shows two in 10 people knew their current relationship was serious after they planned a holiday together, while 43 per cent said the words 'I love you' and the same percentage discussed moving in together.Indeed two thirds of people polled and in a relationship claimed they felt their first holiday together was a real milestone and demonstrated how committed they were to each other.Four in 10 people went on a short break together first to make sure they got on well, before making the commitment of spending seven nights or longer in each other's company.And when asked how far into a relationship a holiday should be, the average person reckons about seven months in.A spokesman for Monarch Airlines, which commissioned the study said: 'Dating is a minefield at the best of times.'But one of the most confusing and stressful parts is deciding firstly when you are both comfortable saying you are boyfriend and girlfriend, and then secondly, when that partnership has reached the next level.'As this survey demonstrates, there are loads of factors which couples take into account before deciding whether their relationship is serious or not.'It's no longer just a case of talking about moving in together, marriage and children. There are smaller elements such as when to say I love you, when to stay the night, and when to swap house keys.'And there are other acts which can show real commitment such as agreeing to spend a week away together or attending family gatherings.'We are pleased to see that taking a holiday together is the third most popular sign that your relationship is getting serious. 'People travel for lots of different reasons but spending time together is one of the most popular.'They added: 'The indications that a relationship has become serious will be different for every couple. But, booking a holiday or short break together can be a good test of a new relationship.'Others will simply be happy to have a toothbrush at each other's house and a good night text message.'What is clear is that relationships are a complex business, and it takes time and effort to create a long lasting and meaningful union.'(dailymail.co.uk)ANN.Az