Search Results: girlfriend dates another guy

So my boyfriend and I have had our ups and downs. In the past, he has given another girl his jacket, lied to me majority of the time (while knowing he was lying and did not have a definite plan/date on telling me the truth), lied to me about different girl's history with him the first week into dating him (he said they weren't anything when in fact they were), not listening to me when I ask him to not do certain things like buying me stuff (even when I tell him that he can give it to me on a later day), and only talking to me when it's most convenient for him on his schedule.

The lying happened towards the beginning of the relationship, he eventually had to come clean whenever I discovered his previous relationship with that girl. We've been dating for a year and a half now. My huge relationship no no is lying/dishonesty and he knew that yet lied for so long. But i feel like he's taking advantage of me because he knows that I have that "reap what I sow" mentality for this relationship. I've been the best girlfriend I could be ever since I have been dating him but he's been the opposite but I'm hoping that he eventually does turn out alright. I feel like he's taking advantage of me physically, mentally, emotionally, and financially. He doesn't ask for money (sometimes) or gifts but I feel like I'm obliged to since he doesn't have much money himself since he's still in college when I'm not. I'm not sure on what to do. He does make me happy every now and then but I feel like that only happens when I'm trying to not think about what he's done to me or get caught up in the conversation (s). Tell me what you guys think.