Mr Wrong??

The guy I am dating has issues but I have fun going out with him. However, he is quiet different from me. For example, in past relationship it took him 1 year to say the girl he was dating was his girlfriend. He doesn’t want to talk about his past relationships or how many people he has been with. He says that I am so awesome and he has never met a girl like me before, however, he will not talk to me for like a couple days where I think he ditched me and moved on. But then he will talk to me after I text him or call and act like nothing wrong. I am the kind of person I tell the other person how I feel about them, I am an affectionate, romantic, emotional person. I buy him stuff if I know he likes it just because I am giving. He is cheap with his money. Like if we go out to bars he will buy all kinds of people drinks but says he is not going to buy me Valentine gift. We went to this concert and the whole time he was basically talking or hanging around his ex girlfriend that was there w/her fiance. We were there basically with all his friends so I felt left out and just like a tag along since he wasn’t paying me attention at all. I just left went back to hotel and was basically walking around town I didn’t know by myself to find place to call cab. When he got back to hotel he said stuff like you hate me don’t you, and then he said how much he missed me and how much he liked me. I was thinking if he liked me so much why didn’t he go to hotel appologize and ask me go back out with them, he didn’t he got back in hotel at 3 am. When I told him why going back he just said I am sorry that you are not having fun. Not that I am sorry I was paying attention to you or making it seem like I am more into my ex. Whenever I ask him what he thinks of me or what he wants from me as in relationship he won’t answer and just tells me, that he wants a girl that is open & honest. Also if I ask what he thinks of me he says I have fun with you and like getting to know you. Basically answers that show no feelings what so ever. Just recently for Valentine’s day he said the concert tickets were my gift , however, he got them few months ago before we were dating so it offended me. Also the same day he said not getting me valentines gift he was buying perfect strangers beers all night in the bars. Also since he doesn’t talk about feelings I wanted him to at least get me a card or write something sweet down on paper about his feelings. He didn’t even send me a text on valentines day or call to say happy valentines day. Also besides him not saying how he feels about me , he talks about other girls around me and it makes me feel bad because he doesn’t talk about how he feels about me that much. When we went to concert he was saying I don’t see that many hot chicks yet. Well basically my question is Should I ditch this guy? Would this be offensive to other girls?