I (28F) have been with my boyfriend (31M) for over two years. We live together and are genuinely best friends. A year ago, my boyfriend decided to go on Lexapro because he experiences what his doctor believed to be “anxiety attacks” once a month, at the same time every month (please also comment if you’ve ever heard of something like this). The “anxiety attacks” have continued, so his doctor wants him to get off the Lexapro and see a psychiatrist to rule out anything going on with his brain because his doctor no longer believes he’s experiencing “anxiety attacks”. The downside is that the Lexapro has a number of known side effects, all of which he has been dealing with the past year since going on them. He never dealt with depression before, but he now admits he wakes up every morning unhappy (but that it gets better throughout the day). He has completely lost his sex drive, which has taken a toll on our relationship. He never *wants* to do anything and instead just does things to either a) make me happy b) make his family happy or c) pass the time. He says he feels guilty because he can’t give me what I “deserve” and that he thinks I would be better off without him. He says he knows he still loves me, but isn’t sure he’s still *in* love with me because he no longer has a desire to kiss, hug or have sex with me and it scares him. 
What do I do? I try to frequently reassure him that I love him and that it’s my turn to take care of him just like he has previously taken care of me. I try my best to be patient and give him space while also coming up with (what I think are) fun ideas to get him out of the house. My gut is telling me it’s just the depression talking and that he needs love and support right now, but there’s also that little insecure voice inside my head saying he’s doing whatever he can to push me away and that he actually doesn’t want to be with me anymore - depression or not.