How many chances should a guy your deeply inlove with get ?

ive been with this guy for over a year now. hes never cheated on me (sex wise) but he has talked to other people while he was talking to me at one point (actually twice), & i gave him chances both times, but i cant really trust him nomore so every little thing he does i yell at him for. so we argue alot now. but we cant ever leave eachother alone, cause we are so in love. im just waiting for the next time he fxcks up though but idk if i can leave him cause im so in love& itss wayy to hard. how many chances ?