Pit help!

Okay this is pretty embarrassing my armpits like always stink. Idk what to do. Deodorant works for a little bit maybe but I have to put it on like 5 times a day and I feel like it still doesn't get rid of all the smell. I've tried the ph balance ones before I don't think it really helped. I've tired different brands. I try putting some coconut oil on. I shower daily or every other day, I'm not overweight at all I'm like 115 5'3 pretty much exactly where I'm suppose to be so that's not the issue. It's not like I really sweat much either. Idk what it is or what to do I've been asked before if I'm even wearing deodorant&my bf has said stuff before how my pits stink&how it really turns him off for sex. Idk what else to do its so embarrassing😢