I need opinions on this sexual thing I've been experiencing...

So I've been noticing that whenever I have sex it's always a mix of pain and pleasure. At first I thought it was because I like rough sex like hard and fast. So I asked my fwb to slow it down but I still felt pain and while the slow sex I felt even more "stretched or filled". Then I thought maybe it was my fwb's size so he fingered me instead and I still felt pain when he used two fingers and then some pain when he used one finger. He told me I was just really really tight so that's why there's always some pain. Which I guess makes sense I'm not a big person lol I'm 5ft tall but I thought my pussy would be able to get used to him. Also, on a happier note I actually do like feeling pain during sex I think it's hot (it's the good kind if pain like "omg I'm getting fucked hard!) But I was just curious about a no pain sex maybe it would be boring idk. Do I have to worry about being too tight? I googled it and there is a condition for being too tight but I don't think I have it or else I wouldn't be havinh sex I guess