Insecure

Ok so I love my boyfriend a lot and Ik that he would NEVER judge me because he is head over heels in love with me but...recently we’ve been getting to that point in making out where you start to take off the other persons clothes and everytime he reaches for my bra I don’t let him take it off. I really don’t like how my boobs look and I’m very very insecure about them but I feel bad because we’ll be naked and I’ll still have my bra on and Ik he would never say this but I can tell he really just wants me to take it off but I can’t bring myself to it. Someone please help I hate being insecure :/