Sex Advice.... Please? No Judgment??

Okay....so I'm honestly on the verge of a panic attack just writing this because I'm so nervous this isn't okay to ask/everyone will slander me or something but.....

Okay. So I have this boyfriend, we've been together for a while, have been doing to do and stuff, but.... for some reason, I just never, you know, 'finish'. like, I reach that level of pleasure, I just don't think I actually... cum?? I feel so stupid.... he's the first and only guy I've ever had sex with, so I don't really know much about it. The guy I was with before him though, we would do sexual things (essentially everything but him putting his dik inside of me), and even though I never felt it, he always said I came. Most of the time when my boyfriend and I do it, he finishes inside of me, so (this is going to sound soooo stupid) maybe I do and neither of us notice I guess...???

Its not that my ex pleased me and he can't, because I reach a higher level of pleasure more often and stuff with my current. I don't know, sorry if I sound super dumb, but if anyone has any advice or anything....that would be appreciated..