Any commentary or advice?

So I've never posted anything like this buuut what the heck lol.. Um I've had really bad anxiety for the past few days so I may just be thinking this bc I'm all emotional and whatnot but how my bf and I have had sex lately is really getting me confused. I'm 18, he'll be 22 soon and lets just say he's way more experienced than I am which isn't bad but I guess I get discouraged bc lately it's been taking him awhile to cum and when we have sex sometimes he'll quit and ask if I'll blow him to finish.. and it makes me think the sex isnt good enough. He tells me everything we do is awesome and fun but I just feel like he's not satisfied and I hate that. We try new things and it seems like everything is perfect, he says he actually wants to marry me which better happen since I lost my virginity to him lol so yeah I would love to know if anyone has any commentary or help?? Maybe I'm stressing over nothing Idk. I've talked to him about it and he never says anything bad but while it's actually happening I feel like I'm getting mixed signals.. Anyways, has this happened to anyone else or do y'all have any advice?