Mismatched Libido

My boyfriend (29) and I (25) have been dating for 9 months but officially together for 6 months, at the start of our relationship it was very fiery, we would have sex once a week when we saw each each other and it was decent even though i didn't orgasm each time i just really enjoyed the intimacy and connection, however since november we rarely have sex maybe once a month and if we did he would lose his erection midway or would not be erect at all and we would have to stop. We've talked about it and he explained it could be from the medication he's taking as he's struggled with it for the past couple of years, it's at the point where he feels he has to take viagra if we've planned sex (valentine's day and my birthday). I suggested that maybe we go to the doctor to see if there's anything that could help but he's refused because he feels embarrassed. I feel that i've tried to be really understanding by not pressuring him if he doesn't want to have sex, finding other ways to be close and being patient and waiting for him to come on to me but I'm not gonna lie it really sucks. I really love and care for him and he loves and cares for me as well but it's really hard. I feel kind of disgusting for wanting it all the time when he doesn't. We don't see each other that often either (a few hours each weeks) so it's really hard to reconnect in other ways x Sometimes i want to touch him or kiss him but he thinks it'll lead to sex and will sometimes push me away. Please help😔