Should i let him go or stay ? mature ladies only !?

Ive been going with this boy for a couple of months . but he cheated on me with a girl he said he cant stand which dont make sense to me. me and him took a break but we have still and are close and he told me he had with her and was thinking about me. he still tell me he loves me and everything but we took a break cause he dont want us gettin on eachother nerves . which i understand . but some days i feel hes using me cause i love him to death and dont want to feel like he can get what he want out of me :( should i move on or see what happens and he also gets mad when he knows im talkn to a new boy . i dont get him sometimes.... and i also think i might be pregnant by him. and hes soooo y too abd i hate that ... sorry for getting off topic lol but what would you do if you were in my situation ?