So I’m in highschool, and my gf gives me bjs whenever I want, but doesn’t want to finish in fear it will make a mess, nor does she want to take it in the mouth. This is both of our first times with anyone doing anything sexual, and she just started getting comfortable giving head.

She also tends to still be nervous on giving them, even when I try to increase her comfort level with them by pointing out good things she does when she sucks my dick.

She doesn’t seem very enthusiastic about doing it either, and sometimes stopping like midway through saying that she doesn’t want to keep going. How do I fix this, without being/sounding rapey?