My boyfriend disinterest in sex messes with my head??!! :((?

Me and my boyfriend went from having sex 2-5 times a week to frikking never. I have a high sex drive, I enjoy being sensual with him. Lately, he will get in the mood, and then randomly blow me off: He will go from getting me in the mood to watching TV the next second and just leaving me there on a totally different level, and it's really unfair. I don't like sitting there turned on one second and being ignored the next. It's starting to make me feel really odd and insecure about our relationship. FYI: I know it's not my weight, because I'm a healthy weight. I know it's not my looks, because he tells me I'm sexy all of the time. The only problem is, he is saying it but not making me feel it. I've tried everything he's into to the point that I quit: Lingerie, delicious meals with the lights dimmed, and on one occasion, a corset. All he does is complain about the meals I make and what I should and shouldn't have added, and he totally ignores the fact I bought a brand new Victoria's Secret Bra for his eyes only. All of our friends from High School tell me he's way out of my league, and that i can do better..my family says the same. But I've known him for about 7 years and have dated him a year and a half. We are both 22 as well and lost our virginity together way back, so it's not like we are kids. It blows my mind though, my friends have boyfriends my age and they can't keep them off. The only time he wants to have sex (which is very rare), he expects me to drop whatever I'm doing and just do it...It's on his time and it lasts about 5 minutes. No foreplay, nothing. And normally when I think would be a great time to love him, he turns me on and when I try and return the favor he grabs my arm firmly and tells me to STOP. It's not like I'm even trying to hurt him, I'm trying to love him? And why is it when he has these rock hard erections he tells me his penis is in the mood to have sex but his brain isn't. It just blows my mind. I told him the other day I couldn't be with someone who wants to rarely engage in a little bit of love making, and he came back to me that I'm just being horny. That isn't it at all...I miss feeling like HIS woman. :( It's made me very emotional too, I do want to feel needed in that category for goodness sakes! He told me that he wasn't going to change his sexual patterns to please me, and he got mad I asked for a little bit more of his time. He can make time for everything and expects me to be glued to his side 24/7...but when it comes to making love he acts like he's just tired of me. I'm getting tired and bored of our relationship. I don't know what to do anymore.