Relationships

I'm in love with this guy and we've been with each other for almost a year now. I love him so much and it's great. The relationship is very strong. But every once in a while he'll say things that really hurt my feelings a lot and I do let him know. This is the best relationship I've had but I also feel like it's killing me (not literally) and stressing me out at the same time. Any words of advice? ?