I'm in a relationship for quite a while now. I love my gf, but 3 months ago I saw which you could say my first love at a mall. I felt the usual heart rate gets fast etc. I saw her with her boyfriend and I may have felt jealous. These days I start to miss her... I keep thinking about her. I love my girlfriend, but my first love keeps haunting me... What do i do?

You need to face your past.

Whatever you do, just don't run from the past. And if you decide to do something about it, make sure it's something you wont regret later on. And this may sound cold, but if you love someone else, you don't really love the first one to begin with

Face it or forget about it. She's probably not worth you. You're better than that. I highly suggest forgetting about her.

Love is complicated. I face this issue myself.

Here's the thing. If you love/loved someone EVER. And one day you decide you don't want to love them anymore, life will just be like "too bad!". You will always have a tiny part of you that still loves that person.

I think the reason you miss her is because she reminds you of the 'old and simple times'. and you keep thinking about her because when you do remember all those old times SHE just happens to be there and your mind has the idea that she was a significant part of that memory because of how you felt about her then.

You have a girlfriend. You should be grateful for her. What if she is in the same situation as you? I bet she's grateful for having you, so you should move on and do the same for her.

Thanks guys :D