I don't feel the same in our relationship ...

Hello ladies so I don't really know how to start this but I hope you ladies can help me out a little . So my bf and I we have been dating for 2 years . He's 22 and I'm 19 . So our relationship was perfect we where perfectly fine intill on New Years i found out the worst night mare everyone would  want to go through . After spending time with him and his family on New Years he took me home so I can rest he wasnt going to see me the next day which it was the first day of the year bcuz he was going to a 49er game with his brother and dad . So that morning it was a Sunday I was sleeping while I got a msg from him like the usual saying "goodmorning babe" so then when I woke up I had a msg from him  but guess what ? Also from his ex . So not to make this so long and so I can get to my point I'm going to make this short. So she had txted me saying he was cheating on me with her they had 2 weeks already txting each other but only saw each other 2 times in person and one of them they hook up and had sex . So she showed me proof that they where together and everything so he tried to denied everything but once I showed him the proof he accepted and said he knew he fuked  up and did wrong . So basically they where just fuk buddies bcuz she dosnt like him nor does he like her . So I gave him one more chance . After that at the beginning I wasn't feeling that comfortable in our relationship but I just wanted to make it work . After a while we where perfectly fine I was a little more happy with our relationship we would get along perfectly and would understand each other perfectly intill then this happen , he then unblocked his ex from fb and I asked him why he had done that he said just to get me mad bcuz I was over reacting the other day but that he will block her again . So I didn't wait for him to do it , I did it my self I went and block her but then 3 days ago I found out she is unblocked again and I told him why he did that he said he hasn't blocked her since that one day I found out I told him that he was lying bcuz I had done that my self and he kept saying that no . So I told him I was done with him that I was tired of his lies and how he hurts me and didn't know how to value me so I left him but 2 hours later he txted me saying that to love him and get back together with him bcuz our little angel whose know on heaven wouldn't like us been separated. So that made me feel bad and I got back with him but yesterday night I found out he had whatsupp and the last time he log in was the 26 of last month which was feb. he supposedly told me he had it bcuz his step mom told him to let her use it since she had to send some pictures through there to one of her sisters but I didn't believe him . So my whole point on here is that I'm not feeling the same in our relationship like I really do love him but I feel like I have giving him so many chances he's just taking advantage of me know . I love him but I don't feel that connection in our relationships no more .i wanna work things out with him but I don't know how to bring this up to him with out making him think that I don't feel love for him no more . I just feel like that spark it's turning off little by little . How can I bring this up to him ? Or how can I make my self work so I won't feel this way no more ? Thank you ladies in advance may god bless you ❤️