Hi Melissa. I assume you've heard it all so perhaps you could help me out?

I have been dating someone for a year, and we're both definitely attracted to eachother. He remarks on my appearance all the time and is clearly aroused when we are kissing, hugging, etc. He always achieves an erection and orgasm when we do hook up. However, I'm confused...because in past relationships I've had guys who were very "sexual" sent me erotic text messages, asked for naked pictures, would tell me they couldn't wait to get home so they "bleep" me, were all over me all the time. Now, admittedly, this is the longest relationship I've had since I was 20 or so, and I"m now 33--so maybe something changes after time...but he's never been like that. He's always been happy to have sex, but never really GUNG HO or erotic like those other guys. I know he occasionally watches porn, but he never asks for anything in the bedroom other than the usual positions, a little dirty talk, that's it. One time we talked about doing something different but he said he didn't want to "degrade" me...I said "degrade away!" but it seems like he reserves that stuff for fantasy. I'm frustrated on two counts I suppose--I can't help but wonder if from the very start I wasn't the right girl for him (though he says he's very much in love w/ me, wants to move in together, I'm the best thing that ever happened to him, etc.)..Is this normal? Maybe if he were with another girl, one he found more attractive, he would be thinking about sex all the time? We have sex a few times a week right now--but as mentioned above, it can be a little routine. Within a month of our meeting he told me he was having a hard time "keeping up with me"--we had first met, so I was aiming sometimes for twice a day--definitely once a day. He says he's never been into doing it that often...but maybe if he met the right girl he would? I just keep coming back to it being my fault or something--like if I were attractive or hot enough he would have more desire. Are there other men out there like this? I love him so, so much--but am obviously insecure a lot of the time. Any help would be appreciated. thank you!