1 They are your worldHe or she is the person you text all through the day. You've let this person know you inside out: from your darkest secrets to your vulnerabilities, to your weaknesses... you've shared them all. You want this person to be the first one to know of everything that happens in your life and you don't think twice when looking for a shoulder to cry on. If your idea of spending 'quality time' is to be with this person, you know that you are getting emotionally attached to this person.
2 You can do it for themYou care about his or her happiness more than you do for all your other friends, and instinctively know whatthey want. You'd often go out of your comfort zone to help this person. Pragmatically, you can read their mind and know exactly what they are up to. In short you can complete their sentence.
3 Constant benchmarkYou constantly compare your best friend with your boyfriend/girlfriend and even wish they were more like your bestie! And you’ve often mentioned about this to your best friend. It’s a major sign that you look up to your best friend as a perfect partner for you.
4 Jealousy IssuesYou feel jealous when he or she talks about someone else. Seeing your best friend flirt with other people makes you very uncomfortable. You experience feelings ranging from irritation to supreme envy. You often tend to feel that you should be their priority and not any other friend of theirs. You tend to exercise control over them in this case.
5 You actually picture yourself with this person.Yes! You imagine how things would be if you dated your best friend. How perfect and hassle free life would be as you consider them the perfect one for you. This sign proves that you’ve fallen for your bestie and it’s the time you confessed to them about it. You never know it turns out to be another kuch kuch hota hai so bang on!!