Is it him or me?

My bf and I have been dating for 1 1/2yrs within this past month hes been unresponsive, less interested, needing more alone time, less intimate, and definitely does not like talking about his feelings (which is fine to an extent). He says he doesnt love me anymore but still enjoys and wants my hugs, eating together, and sleeping next to me. I think that maybe hes slipping into a depression and that inadvertently is making him say that he doesnt love me. Work has been hard like usual (we work together) and i know hes expressed he feels like a failure and things like video games give him a little less enjoyment than they usually do. Does he really no longer love me or does he need therapy?