Relationship advice

Hey guys! I was hoping to get some relationship advice. I’m a 26-year-old male and my boyfriend of two years is 23 years old. We were best friends for 2 years before that. About 6 months ago, his libido really dropped. We gradually went from being sexually active daily to maybe once a week. Even then, I had to start it because he never takes the initiative now. He is still loving but never shows sexual affection which is important for me. It makes me feel really bad about myself and like I’m just not attractive anymore. I didn’t say anything for a couple months about it but I have since brought it up to him several times and explained to him how it makes me feel. He apologizes and says he’s frustrated regarding his lack of sex drive too, but he’ll “try harder.” As a side note, a thorough medical checkup was unremarkable. Also, based on our schedules, I am 100% sure he isn’t cheating or anything like that. He suspects it's just stress at work causing it. Despite me telling him how it makes me feel, he really makes no effort to fix it. I've even suggested sexting/snapchats, sexual joking comments, etc - but there's been nothing. As we lay in bed together at night, I curl up feeling really rejected (hoping this will be the night he’ll make a move) and he’s peacefully falling asleep inches away from me. If it was the other way around, I would do anything to prove my attraction towards him and to keep him from feeling rejected and bad about himself. Hell, even if I didn't want to have sex, I would do it make him happy.What really bothers me about all this isn’t precisely the lack of sexual activity, but rather the fact that I am telling him how something makes me feel and yet, he doesn’t make it a priority. I worry about what that means for future issues in a LTR. When I talked to him about it last night, he said he would be "disgustingly happy" to spend the rest of his life with me, but felt that he just couldn’t make me happy in that way. I’m not sure if he was just frustrated or what, but he later suggested that we just be friends rather than boyfriends. I told him that I simply wasn’t in a position to be friends and that if he didn’t want to date anymore, we could just be done with each other. He said he felt like I was holding him hostage because he didn't want to lose me, but the reality is that as much as I’d hate to not have him in my life at all, I would need him completely out of my life to move on. Everything has seemed back to normal today so I don’t know what’s going on. But I don't want to be in a relationship with someone just because they are afraid of losing our friendship and his primary support system. Again, it's all very confusing with the "disgustingly happy" thing. Any insight into this mess would really be appreciated!