How can I get confidence? (For women who do not agree with porn)

Please help me. I want to become more confident about my small boobs. I have an A cup. My boyfriend is constantly looking at other girls chests and looking up big breasted women online. It hurts.

(I am even against porn in my relationship for other reasons as well, no rude comments, it’s just how I am and it doesn’t affect you, I’m not going to change my mind so only want positive advice).

Anyway, it hurts when I have such small boobs that I have thought about getting a boob job. Although my boyfriend tells me I don’t need it. It’s gotten to the point where I dread watching movies with him because (from past experiences, he’ll like a girl, and then search her nudes). I want to watch a movie with him and not be so paranoid about nudity here and there but I am. Because my confidence is 0. I try telling myself that he is with me and not these women but it doesn’t help. I don’t feel attractive. He rarely touches my boobs during sex or at all and never compliments my body. I can’t remember the last time he’s said something indicating that he was attracted to me. He’s never even called me hot. (And not to be braggy but I know I’m not ugly because I get hit on a lot but I don’t feel attractive).

He doesn’t understand and just calls me immature. I will never agree with porn and I can’t stop his thoughts but I hate feeling so shitty when we watch something and a girl with big breasts comes on and he hard core just stares even just at cleavage. (I don’t believe it’s just men’s nature, i think they have self control, but just choose not to. I don’t believe they need porn or looking at other women.)

How can I feel more confident? I could get more tone I suppose.