How do I handle this?

My husband is rarely horny. We have sex maybe once or twice a week. Im always the one initiating it. I'm not satisfied. I feel like I'm being rejected every time I try. I'm at the point where I don't even want to ask. The rejection hurts. I feel undesired. I'm not getting my needs met. Masturbating just isn't the same. I crave the physical closeness too. The tension just builds and after a few times of being rejected I just want to cry. It's hard to not take it personally. I don't know what I should do? How do we fix this? I can't go on feeling this way. I'm someone that thinks about sex everyday and would be happy having it multiple times a day. It's been about a week. He's just never in the mood and says he's not thinking about it right now. What can I do?