I'm too tight???

So me and my boyfriend had sex twice... and every time, he came within like 10 or 12 pumps and he says im too tight and need to stretch out my vagina! The last time we had sex, he stretched it out a little with his fingers and he lasted like 15 or 16 pumps but he still wants me to stretch myself. Like he loves that i'm tight but he hates cumming so fast, ladies i need tips and help! NOTE: He does love me and the sex isn't painful, it's just quick and disappointing to him because we cant even make it to a position change 😣EDIT: Lubrication isn't a problem because im always really really really wet, but would i still need that even if i am?