My life is in a nutshell right now

Help!!! So my boyfriend has been shitty the past few months to me and treating me as if I’m his side chick! Lying to me, talking to another women I went to school with and saying he wasn’t however I caught him, and some other stuff... I told him last night I’m wanting to break up with him and I told him all the reasons why... however after that he was being sweet and scooped me right back into his arms and found my weak spot and I gave into another night of intimacy.... I knew it would mess things up but now I’m so confused...