bf probs

Okay so my boyfriend and I have been together almost 8 months. my feelings for him go up and down all the time. I love him to death and I feel like I wanna be with him but then again I dont.. i have no idea what to do. since month 3 I've had this problem I've pushed it away and tried and tried, now it's up to a point idk if I'm just wasting time or not. some days I'd be like ya I wanna be with him and some I was doubting it like is he who I want to be with for the rest of my life? I wanted opinions.