Should I leave my almost 5 yr relationship boyfriend for someone i like?

well..me and my boyfriend have been together for almost 5 yrs..and well we have been having a lot of problems for the past 5 months. He first started telling me 5 months ago that he didn't love me anymore, and of course, I was devastated I couldnt let him go. He started to like some other girl and would always talk to her and that is what maintained the problems more. Now after all this he still doesnt love me but treats me a little better and says that he is starting to feel the same way again. But the thing is that now im the one that is in the situation that he was in. I dont love him anymore,,I think,,and I like some other guy. I think about this guy a lot and when I see him I get all nervous. He is really sweet and attentive which my boyfriend has been lacking that for a while now. So I dont know what to do, this guy I like asked me out on a date to get to know eachother. So im guessing he likes me as well. But i dont know what to do. I tried asking my boyfriend for some time out so I can meet other people because that is what I really want right now. Im very confused and feel the need to go out with other people. But he cried and I couldnt let him go. What do I do? I really dont know..please help! thanks! :D