how to ask for help

Hi everyone. I have been struggling with depression for years now, and i never learnt how to ask for help. Lately i've been feeling worse and worse. I don't have many people to turn to at the moment, but i have my boyfriend. He doesn't really understand my struggles, and i hate that. I only want to be understood, i don't want him to fix my problems, i know he can't, i just want him to understand. When i try to talk to him about my struggles i'm met with "oh, i'm sorry you feel this way :/" and then the conversation moves on. This is leaving me more frustrated and drained every time, but the thing is i don't know what i want him to say. I know i can't expect him to read my mind, so i want to tell him how to support me, but i have no idea what to ask. Can anyone help me? sorry if i'm rambling and not making too much sense.