I'm a guy. casual sex may have damaged me...

You only BELIEVE you want casual sex, but you're actually not as interested in sex as you think. That's why you feel hollow when you get sex - because you've mistakenly been led to believe that sex is going to solve all your problems and instantly make you super-happy and make you want MORE and MORE. You're not "damaged" by casual sex. You're allowing other people to hijack your brain with garbage lies about how you should behave and what you should have experienced in your past and all sorts of other bullshit. That's a HUGE weakness in your personality that everybody else is going to be able to exploit.

The "no-sex-before-marriage" thing is nonsense. And, I doubt the past casual sex has damaged you. It's probably all in your head.

If you've lost all emotional interest in her, you need to find out why. If it's tied into your sexual experience with her, bear in mind that the first time with a new partner is usually not so good. This will improve with time. Spend more time with her, and see what happens.

The idiot who saidits in a "man's makeup" is full of shit. You obviously want to be with this woman, you've just managed to disconnect sex and emotions because you thought they shouldn't be connected in the first place. The casual sex stereotype is harmful to men because it pressures them to believe they are meant to be with as many girls as possible. No attachment. "Don Juan" and whatnot. You have let yourself be drawn into this too much.

Abstinence isn't the right thing, but it might be the temporary bandaid. Maybe you should lay off physically again for a while and reconnect with her emotionally.

Don't feel bad about having sex before marriage.
It's a great way to get to know somebody... wouldn't you want to know someone VERY well before legally bonding?

wait it out, I'm sure it'll get better.

The same thing happened with my boyfriend and I. He was really into me and after having sex with him I was just like eh..No its not just a guy thing. I just came into the habit of it. But I stuck it out and it passed after a few days and we're crazy about each other. It only took a week at the most..your brain will retrain itself!

wayoutthere is very right. no sex before marraige is great, but isn't realistic and is hardly the best idea for most people. to be honest, maybe you just like her as a friend. and sex made you realize that. love and sex are different, but when you get a girl you feel both for, its perfect. and yeah, wayoutthere is right again, first time is definatley not the best time. and practice certainly makes perfect!:)

I mean hell

I've heard that sex and love are totally different things, maybe it wasn't ment to be and what you experienced was just physical attraction... (this is just my opinion...I'm not really there yet)