Long post but I need advice

So when my husband and I were dating he was coming off opiates, I didn’t know at the time that he was trying to but because he was withdrawing we never had sex, before that we had sex all the time I would jump him and tear his clothes off and it was amazing, well we went through like 6 months of not having sex and I didn’t know why at the time (it was cause he was sick all the time and I honestly didn’t understand what was wrong with him) so because we didn’t have sex for so long I started getting really insecure cause he would turn me down for not feeling good, so I figured that all out month and months after he got off the meds but because of that I just didn’t think he wanted to have sex with me. So I thought that things would get back to normal after it all started making sense and we did start having sex a lot more but I have such a hard time initiating it though, like all the fear of being rejected like I was a couple years ago have overcome me and I’m scared I’ve told him that and he tells me not to be and that he will never reject me but I just can’t pull myself to try and seduce him, does anyone have any advice on how to get my confidence back?