Less in our relationship?

My bf and I have been dating for a little over a yearn- starting over this past summer our life has depleted, we went from doing it 1-3 times a day every time we saw each other to maybe once a week, he claims lately he's under a lot of stress with his new internship,school, etc...I've talked to him about it saying I feel bad, i feel like i don't excite him anymore, and he claims I still do and there are no other problems. I am very ually frustrated and i don't know how else to make it clear how important is in our relationship without sounding like that's all i care about. It just hurts me, I don't feel y anymore, i don't feel as close to him, i don't feel wanted or needed... I feel like shouldn't be something that adds stress to your life, but helps take it away...at least thats what it does to me. He is also is on anti depressants and recently had his dosage uped...idk if this is a contributing factor, he has too much pride to ever admit if that were the issue, i just don't know what to do. He;s 25 and i'm 22 i don't want to waste my time with someone who can't keep up with my desires. Don't get me wrong i love him so much, Something just doesn't feel right about this.