He’s perfect, except he’s a bad kisser

Hi I need some advice please.

I’ve been in a relationship with my boyfriend for 6 months. We are both 14. Everything about him is perfect, he’s sweet, kind and considerate (and he buys me chocolate when I’m on my period) a lot of guys my age are generally d*ckheads and I think I’m so lucky to have him. But I’m always so hesitant to kiss him because it’s just really bad. We’ve talked about it before but he just doesn’t seem to change what he’s doing and it’s really not enjoyable for me and it really icks me out. I just don’t know what to do anymore. So, any help?