I know he doesn’t love me

Me and my boyfriend have been together 10 months and I love him so much he’s the only thing that makes me happy.

Unfortunately I know deep down he doesn’t love me back, he doubts our relationship a lot and constantly makes me feel like I’m not good enough for him.

However when he’s in a good mood he’s so loving it makes me forget all the bad times but idk what to do?

Alot of people are telling me to dump him but I love him too much, but idk how long I can go on with this heartache x