I'm in college since school started, my ex has been making her way back into my life again. It's not too surprising since she is in the same social group as I am.

She screwed me over so badly in the relationship and yet when I see her again, I sort of wish we could be back together. Right now she wants my friendship but all I want is her mouth around my dick.

I told her that after what she did to me, she isn't worth my friendship unless she gives me back something in return. She hasn't texted back nor do I think she will. Do you think I should pursue this any further or just let my remaining feelings for her die?

Read what you wrote over and over again!!
This part I understand but it's clouding your vision, there is many, many more willing to put their mouths on your dick. Wouldn't you rather have an upgraded model?

Move the fuck on!
It is okay to step out of here once in a while, it's a great big abundant world outside of there!

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They call me the cat whisperer, cause I know exactly what the pussy needs.

Whether you want her back as a gf or just a fuck toy, I think doesn't matter, because you can proceed the same way. You screwed up a little because you are still hurt, and you tried to degrade her by demanding sex in return for companionship. What you should've done is just played it cool, and maybe even played up the "hurt ex-boyfriend" role a little bit. I mean, don't act like a little pussy, but don't get confrontational or demanding with her either. Just play it cool. Then when you are eventually wearing her face like a condom, none of the bullshit in the past will really matter.

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“Nothing is impossible, the word itself says 'I'm possible'!” ~Audrey Hepburn

You are in such a golden situation dude. Do what puaninja says; just play it cool.

Abundance. Abundance. And more Abundance!

Surround yourself by women. Get social. that's what college is for. Be friendly with her. Never flirty. Give her the impression that you've moved on to bigger and better things. Smile big, whenever you see her, and make it seem like you just caught her off guard, while you were busy with your own life.

Push and pull. Simple. DON'T chase. She'll be wanting more soon.

She want's "friendship" well, half the battle's over dude. She's probably imagining you as an AFC. Prove her wrong.

Mate her intentions are not that honest.

She knows, that you are still not over her, how the fuck do you think that is a friendship?... so she wants you to chase her, so she can feel good about herself, validation, probably not having the attention she was hoping from guys, and that is decreasing her self esteem, having an ex boyfriend as friend is win win situation.

A friend who will always be constantly striving for her attention being there for her , telling how great she is and beautifull. There will be times that she will aproach you and will fish for compliments be on the lookout.

I had this similar situation, what i did was ok we can be friend. Would constantly flake invitations for coffes and dates with her, And would be so much unreactive so neutral, when she talked i had this constantly bored face, i wouldnt give her anything, would flirt with other girls. Damn would show her that you dont even want sex from this girl.

When she realizes that you have the power she will be the one chasing you. so dont pursue her.

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Oh! You've gotta be kidding me!

You can't go wrong with this.

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"Let me ask you something. If the rule you followed brought you to this, of what use was the rule?"

man , don't give her friendship . you dont need friends ... you already got your homies.

have to agree with the previous posts, as a college student who got out of a very ltr before this current semester (my entire college career and senior year of high school) i could not think of a worse idea than chasing her. i think about my ex all the time, but fuck me if she knows that. as a matter of fact, she came to my frat house the other night to hook up with me and saw me hooking up with some other girl (hotter than her for sure ) and she walked right the fuck out. i felt like a billion dollars bro, if this girl hurt you then fuck her