Is it normal that my boyfriend changed his mind about sex?
I've been dating this guy for about 3 months now, and it's been great. During the first few weeks of the relationship, we were very passionate with one another and had a sexual component to our relationship. After a while though, he started to make up excuses to get out of doing anything sexual. For instance, we used to sleep together (he lives in my building), but he explained to me that he 'liked his regular bedtime routine' and that he would rather sleep alone. A few days later, he stopped me in the middle of things getting heated up to tell me out outfront that he didn't want to do anything sexual with me "ever". Ever since, we have stuck to holding hands and kissing. All of this is fine with me, but I find it a bit odd considering the sexual desire he displayed in the beginning of the relationship. Also, we are both college students open to premarital sex, with plenty of opportunity to do so.
Lately I have been obsessing over trying to figure out what changed his mind about sex. I know he's not gay, because he loves making out and will even say suggestive things to me while we're doing so. Sometimes it hurts because it has lowered my self-esteem (though he assures me it's not me). What is going on in his head?