I met this girl, who just broke up with his boyfriend of one year, went out for a coffee started chatting and two weeks later went on our first date. Up to the first date everything was going really slow. Then on the date I kissed her and from that day she just got really into me and we started seeing each other and she started coming over to my place and we would spend an icredible amount of time together. This went on for five weeks, Then she decided to invite me over to her place to stay and to her sisters party where all her high school friends will be including her ex. Whom she told not to come. But he did turned up and things eventually got really weird. His ex was really drunk, everyone was telling her that bringing was a mistake and that is to soon to move. We went back to her place and his ex followed and slept outside while I was with her in her room! She felt so bad about that, that it started bringing mixed feelings into her and she started backing off from me. But I know she really likes me, but she feels messed up with this whole situation. So we decided talking about it, the other day at my place but ended up having sex and slept. Now she is very distant but still keeps in contact with me.
What do I do? I'm confused because I really like her!

Sounds like it is too soon for this girl to jump into a serious relationship. Unless of course you don't mind being a rebound. I would watch myself here if I was you... things could get messy. If you can't keep your emotions in check I would stay away from this girl until she is ready to have a relationship.

I don't think I'm the rebound here, because I think she broke up with her ex because of me. But yea thanks for your advice I should be really careful here!

If I can say anything is this is true that she likes you very much and love spending time with you but she came very fast into this relationship I don't know why you guys brokeup but she moved very fast may be trying to fill that empty space by being with you. So do not be rebound to her. Because if she is still missing him and feels bad for him and without being considerate about how you feel she is backing off from you than this means she is not completely over her ex and still needs some more time. Give her that time be there as a friend for her but only a friend not a rebound to her please. If she is getting mixed feeling than she might later get confused and all this will ultimately hurt you only. So before you get very serious for her give her time and space and be with her as a support.with time she will be clear what she wants.