Am i being an ass, or is she?

I think the simplest solution is to start counterfeiting money.

You say she's not giving back in any way. Do you really mean this? Is she not giving you the romantic and emotional side of the relationship? Maybe the reason why you got laid so much after those presents was because she felt appreciated and cared for and so it made her happier and more in the mood, not because she was totally prostituting herself, as such, but she still was really.

Anyway, you guys got into a fucked up confusing arrangement...you have no right to demand sex from anyone. Maybe it was kinky for you both at first, I can see that. Do you really want to be with this girl? Have you got something special with her that you can't get/don't want from anyone else? If yes, then talk things over, if no, then leave her.

Short answer: yes, you are. But you also describe yourself as a sex addict, and it's hardly surprising that an addict feels entitled. To make it absolutely clear: you are not entitled to sex purely by virtue of being in a relationship, no matter what you give your partner.

By the same token, you aren't obligated to give her money. I can only assume you continue to do so because you're a sex addict - please get help from a therapist, and get out that relationship with her for your own good.

It seems to me that the "reward system" shit *was* all in your head. It's pretty abnormal way to think about your relationship if you've not discussed it with your partner at all. If you take one thing away from this relationship (when you leave, which I think you need to do) it's that you need to communicate in future relationships.

I'm not going to make any judgements about whether or not she is being an ass too. Maybe she's perfectly aware of your position and she's taking advantage of you, but maybe she's not. In a loving relationship it's perfectly normal for a partner with a lot of money to pay for one who doesn't, and it doesn't sound like you communicate your feelings to her so it's entirely possible she doesn't know how you feel. You clearly already have suspicions that she sees a different sky to you, and I wouldn't ignore that instinct. I'd have to hear her side to make a decision. The point is that you are acting like an entitled ass and you need to stop for your own sake. If that means getting out of the relationship, seeing a therapist and regaining a clear head, then do it.

EDIT: Shouldn't have to say it, but I'm not taking her side. I'm even telling you to dump her for your own good! :P I'm just saying that your attitude to sex, and your experience of it as an addiction, is a real problem here. For me, whether she is taking advantage of you or not isn't the important matter here. You are the focus of your own experience.

Im not sure what to select here as a choice.
in one hand I cant believe you treated her as a prostitute...maybe you need some talk as to what the relationship is next time. A lot of the time people reseave things in a relationship usually in the form of dates and small gifts like flowers...maybe sometimes more pricey gift like jewlery. Buying a girl gifts will not guaranty you sex...and a girl has no absolutely NO obligation to sleep with you...ever. its your choice what to spend on your partner.
Sex at the beginning of any relationship there is always more of it...then time goes by people mellow out a bit...this is usually refured to as a honey moon stage.

However with all that being said she really seems like a gold digger. If you had refured to me as a prostitute no matter how much money you had I would leave you...however she is demanding your money from you... I dont think she cares she just wants your money.
and I think you can dump her ass and find yourself a better girl...hopefully you can establish what kind of relationship you have better next time.
or if she really wants your money she can agree to be your prostitute.

As it stands, you're a walking, talking, breathing human wallet. Just my two cents. The question you should be asking is what happens when you really go broke.

Try not to be too naive. She know's exactly what she's doing. She simply expects money without having to earn that kindness in anyway at all. I don't care how you slice it. She *is* a gold digger. Plenty people will defender on a gender basis but you really wan't to pull out now. She doesn't deserve another cent. Relationships are meant to be *mutually* beneficial. She's just leaching off you.

She shouldn't expect money from you and you shouldn't expect sex from her. I'm saying this as an overly sexual person myself and everyone I have been with knows that my sexual needs must be met and otherwise I wont be around.

It is also, sadly, normal for most people to want more sex in the beginning of a relationship.
She can also struggle with other things in her life that affects her libido and you should talk to her, no one likes to feel pressured.

As for the money, don't give her any. Instead maybe take her out to dinner or do stuff together. Don't spoil her with gifts or pay her bills.

Don't I've her any more money without a written contract saying she'll pay u back. Or tell her ur needs aren't being met, so you have no interest in meeting hers. Say you had to get a mistress that costs as much as her tuition lol and blame it on her. Because if she hasn't given you any insurance agains her ripping u off or just leaving u once she graduates after u paid for her entire education. I wouldn't wanna pay for it either, especially if shit was on the rocks.

I would be pretty mad if I had to pay my significant other for sex. Im with you, that dick is mine or fuck off. Maybe.

I think there's a word for people who have sex in exchange for money, can't quite think what it is though.