my boyfriend can’t tell when I finish

I (21F) have been having trouble getting tight when I finish. And recently I feel like I’ve become ‘too loose’ inside. For a bit of background info, I used to be a lot tighter compared to what I am now. It was normally hard to fit in more than 2 fingers during foreplay and it always felt uncomfortable whenever the initial penetration happened, but after some getting used to, it starts to feel good. And incase I need to make this clear, I was never forced into it nor was there ever a lack of consent from both of us. This was something we both wanted whenever we were intimate with each other.

It’salways been like that, even in my previous relationships so I don’t understand why I’m having such a hard time tightening up/contracting. Now he can fit in 3 fingers easily and he would constantly ask me if I already finished whenever I came and he didn’t feel anything. I mentioned it to him casually one day that I noticed that he can’t tell when I finish anymore and he reacted as if he got caught. He was a bit surprised but he shrugged it off.

I talked to him about it and he said he didn’t mind but I can’t help but feel bothered because I’m not like what I used to be when we first started being intimate. I know it sounds silly but a part of me feels like I lost something that made me more sexually appealing. Being loose or tight isn’t the end of the world and I know that it shouldn’t be a big deal but It worries me that I might not be pleasing him as well as I used to anymore and I don’t know if I’ll ever be able to go back to the way I was.

I don’t have anyone I can ask about this and I couldn’t find a clear explanation from google. I don’t know if other women experience this and I feel very lost. any thoughts on what could be causing this? And maybe a few tips that can help me get back on track?

(english isn’t my first language so please be gentle with me if I made more than a few mistakes. thank you!)