When will I enjoy it?😩

So I lost my virginity to my boyfriend a little over a month ago and since then we've had sex 15 times (I'm such a nerd for counting *cringe* πŸ˜‚) but it's still painful as fuck like I honestly dread it when we're in bed and I can feel his hard on touching my ass cause I know we're about to have sex πŸ˜‚ (don't get me wrong I'm horny too but the thought of the pain makes me hesitant) every single time feels like the first time... I was just wondering when it starts to feel nice cause I'm starting to wonder why people love it so much 😩 (I'm 21 btw) πŸ‘ŒπŸ½ and YESSSS!!!! we use lube every single time πŸ˜”