Stupid and inlove.

Dear sis Dolly

Im a 20 year old student who has been dating this guy for a year this month. honestly,when i met him i was really taken by his charm and i found out that the fellings were mutual and we started dating,within a week of dating i hear that he has a girlfriend but people told me it was an on and off thing and that at the current moment it was off, so i stuck around cause i loved him and technically he wasnt with that girl…i couple of times as the relationship progressed i would see him with her or see the posts she would make on his facebook page but still i stayed cause i loved him. recently we have been arguing about this other girl and finally he admits that he is seeing this girl and that he wanted out of that relationship but they have been dating for so long it might break her so he is looking or rather working on a better way to do this without hurting her…i feel more stupid telling you this,more stupid then i did when i actually listened to him and took his word. Today he called me over to his place and about 5minutes after i got there the other lady arrived and he hinted that i should leave by winking and telling her that he did not know what i wanted from him and why i was at his place. i left, obviously heartbroken,i just wanna know, what should i do? Yes i love him but this is a bit too much. Please help