<human>: I moved to Japan to be with my SO 2 years ago. 

I really love my partner, he's basically my best friend but he's really depressed and I don't know how to help him. He says he's completely numb to emotions and as result doesn't know how he feels about me/can't feel love for me (However I don't totally believe that's true based on his actions). 

He's tried counseling and supplements but it's not working. Getting the proper help in Japan is not really doable. It's already been 4 years for us and career wise, I don't really have a future in Japan. But I really love living together and he's always so affectionate and supportive towards me.

However, we are probably going to break up because I'm moving back home in 2 weeks. I don't want to stay here and I don't want to be in a long distance relationship with no end in sight. Part of me hopes that not having me around will help him realize how he feels.

 I know I'm doing the right thing but it just feels awful and I hate hurting him and hurting myself. I can't adequately express how much I'll miss him and how important he is to me. How do you break up with someone that you still love and want a future with? The thought of dating someone else just makes me feel sick. If anyone has any advice for me on how to survive this I would love to hear it. I just feel totally alone right now.

Can you condense the text into a few key points?
<bot>: SO is depressed and as a result has no emotions. He doesn't feel love for me so I'm leaving him. Need advice on how to survive a breakup with someone I still love & want a future with.