<human>: I've been with my boyfriend for about a year and a half now and something I've wanted to address for a while now is his increasing depression. He's fought depression ever since the start of our relationship, but he's never been open to talking about it because he feels its his problem and none of my business. I feel differently because we spend a lot of time together and the effects his depression has on him are very noticeable. They've only gotten worse since he's stopped seeing his therapist, but when I try and bring it up he shuts down the conversation because his problems are none of my concern. Ive always been worried about this side of him but it also hurts when I feel he can't empathize with how hard it is for me to be around but never address. What am I supposed to do? If talking about it will only make it worse then how to I communicate my feelings about this to him?

Could you distill the essence of the text into 1-3 sentences?
<bot>: Bf suffers from depression which he says is none of my business and won't talk about with me. I'm worried and only want to help.