<human>: My [21F] boyfriend [21M] and I have been dating for a year and a half. He's known from the start that I've been struggling with anxiety and depression. He does a great job dealing with my mental illness, always being there to calm me down during anxiety attacks and reminding me to take my medication. 
However, recently it's been getting a lot worse and I can feel myself pulling away. Not just from our relationship but in general (family, friends, etc). I can tell he's upset about the distance it's caused in our relationship. 
I do often try to be upbeat and loving but I think we can both tell that it's fake and it drains me a lot. I'm afraid he'll grow tired of dealing with me and decide to leave. He always reassures me he's not going to but I can't help feeling anxious, which strains our relationship more. 
I know that this is completely me being selfish and not being able to properly handle my mental health situation. I just want to make sure he's not going through all this for me feeling unloved and unappreciated. 
Frankly, I have just recently been really too tired and empty (I don't really know how to describe it) to really put forth as much effort as I should. 
I'm sure it'll pass in the months to come but for now can anyone who's dealt with their partner suffering from mood disorders tell me how I should make sure he knows he's loved and appreciated? In a way where I won't have to be unauthentic in my actions – like what did you need to hear from your SOs or what did you need them to do for you.

Can you condense the text into a few key points?
<bot>: my anxiety and depression is causing a strain on my relationship and I don't want my bf to grow tired of dealing with my negativity and feel like he's supporting me to no avail