Please help..

I'm in a relationship where I'm EXTREMELY comfortable in my depression and it just keeps getting worse .. I just feel like all my relationships I've been the provider so that's not going to change and I'll never be truly happy so why not stay with him if he makes me laugh and we have decent sex ... Might as well right ? Idk it's just ...my gut and head is saying this is the wrong idea but sometimes my heart feels differently . I really do love him ... At this point I really don't know what to do .