hello, thanks for reading my question. i've struggled with depression since i was a teenager, had years of therapy, take antidepressants, and know how to handle the dark days when they come. though i haven't been acutely depressed for a while, i feel i have a tendency towards sadness that shows itself regularly.
my boyfriend of 3 years recently confronted me, saying that when i act vulnerable and sad he isn't attracted to me, and that i need to change my behavior or it will be hard for him to be in the relationship. he's a great guy, a kind person, but not someone who has ever suffered emotionally. though he claims to understand what i'm going through, he gets frustrated when i can't give him a "specific reason" for my feelings, and thinks that my negative perspective on life is a choice - that i'm acting weak and anxious on purpose. i was surprised and hurt to hear this from him. i know that this sadness is a part of my personality, and i wonder how much he really loves me if he can't accept all of who i am. should i try to change my behavior to make him happy, or are these just fundamental differences between us that can't be bridged?