heres some thoughts, not communicating leads to unknown things which in turn leads to doubts and fears, you need communication, feeling rejected unwanted or feeling like being attracted to your partner is somehow a problem can all be feelings that come up when your partners are working through the things they have to deal with when you are going through things, the best way forward is communication talking and understanding, sex isnt just about a physical release, it also involves a fair bit of closeness, all i can say is talk to your partner about the troubles you are having, if they can understand what is going on it makes a big difference, knowing that the reaction they may see and what you are going through dont mean they are being rejected can mean a lot, staying close but working together to understand what is going on is something that will help, hiding it and saying nothing only makes it harder to talk about and to communicate what is going on, and also a lack of communication leads to more problems and fears.
just a few thoughts.