Still.
Should I try to get back with her.

Or marry the guy that I love now

Well I wouldn't marry anyone if I still had feelings for someone else. I'm not saying you shouldn't be with your first love, but you need to really think about who you want to be with.

Before you marry someone you say you love, you need to find out if you truly love your first love. If you marry the guy you say you love and then later have those "what if" thoughts about your first love, you are not going into the marriage with the right attitude.

Take a breather and search out the first love. See if there is anything there. She may not feel like you do. Then again, she could be. But you are not going to know until you make the decision to at least contact her and have a serious talk.