aw. I know how you feel. My husband does soooo much for me but sometimes he's not that affectionate with me. You didn't mention exactly how he ignores you or how you feel like you're second best.. like does he choose others over you? Or would he rather play a sport/video game rather than watch a movie with you?

I think you realize that he does a lot for you but you just don't think it's enough.. you know what? You need to learn to appreciate him more. Even though you do realize that he does a lot for you, you're not really appreciating him and thanking him. And so he doesn't want to go any further since he doesn't get a positive response from you and it's never enough anyway.
Maybe your standards are a little too high. This is something that I've had to deal with because I expect my husband to be perfect, to always want to cuddle and be with me.. but I don't realize that he's human and he has other desires, wants, and needs. Maybe you need to realize this, and stop expecting so much. He's gonna start feeling like nothing he does is ever good enough.

And trust me, you don't want him to feel that way because he will simply give up.