Yes I agree with Perna. You should talk to your husband and your therapist. Sex does sometimes wane after being together for some time. Sounds like you have a good husband. I'm thinking he may not be initiating out of respect for your feelings and his ego/enthusiasm might be dampened from your lack of desire.

It would be great if you could work through the SA. It's not fair that you/husband miss out on this special part of life because of what happened in the past. Best of luck in healing.