Why is it so hard for me to finish??

Hello ladies (and possibly gents) I have an issue. My boyfriend and I have sex pretty regularly. Not every single day but we try to have sex every two days or so. It is kind of hard to find time thought just because our schedules are very different and neither of us live alone so we don’t get a lot of one on one time. When we do have sex we usually are both pretty in the mood and we both want to do it but for some reason it is so hard for me to finish. He does usually finish pretty fast, like tonight we were done in less than 7 minutes, but that’s not something he can really control so I try not to get upset by that. But when he finishes he is done. Very rarely do I get a round two. So most of the time it is just a quickie and I don’t really get much out of it. We are usually done right about the time that it actually starts to feel good for me. I do finish every once in awhile but it’s rare. Maybe two or three times a month if I’m lucky. It is just so frustrating for me because I don’t want to be upset after we have sex. I will literally sit there after he finishes and just be on the verge of tears because he got to finish and I didn’t. He finishes every single time we do anything whether it be sex or I give him head but then I almost never finish. Does anyone have any tips? Or is this normal? I just don’t know what to do. I am just getting to the point where I am so uninterested in having sex because I know I probably won’t finish.

Oh I’ve also tried to talk him into trying toys and everything but he is super against them. He doesn’t want to try a cock ring or anything and he doesn’t want to try foreplay with like a vibrator or anything. Hell he doesn’t even want to do ribbed condoms.

Help??