Might be depressed? What to do?

Sevina
I've struggled with depression for many years but for the past year or so I haven't been depressed or suicidal like I was in the past. But recently I've noticed I've been fatigued a lot, I have strange eating patterns and most of the time my mood is depressive. I'm not sure if it's just PMS or something else..
I'm afraid to talk to my boyfriend about this because I'm not sure how he'll handle it or respond. I haven't spoken to my doctor or anyone because I'm just hoping it's just a feeling that passes. I'm afraid of things spiraling out of control like the last time I was depressed even though I'd never turn back to those coping mechanisms again.
Does anyone have any advice on what I should do? Maybe advice on how to talk to my boyfriend about it?