I found this from a search, I was in a similar situation. Virgin girls are a whole different thing to deal with.

I was willing to stop having sex was because she "wasn't getting much out of it" even when I ate her out

It's definitely possible that it hurts for her, which can ruin the experience and turn her off. What worked for me was just going really slow, but deep and hard. Lots of foreplay and gentle fingering before. You need to go out of your way to figure out what feels good for her. Tell her she needs to tell you when something feels good, and when she wants you to try something. You can't ask her stuff like "oh yea, you like that?" because she'll automatically just say yes to make you happy. Need to work with her and find out what positions/spots she likes.

I can "fuck girls on the side while we talk"

She's probably saying this as a compromise, but absolutely DO NOT do this. That will be handing her a loaded gun, complete justification to cheat on you if she ever wants to.

but she says she won't fuck anyone else just talk to other guys if she likes them

That is a huge fucking red flag. She definitely is not sure if she wants to be with you, and is most likely considering exploring other options/guys. She also might be afraid to break up with you and feel attached to you because you were her first guy.

somehow I agreed that I would be abstinent with her up to a point of about 2 weeks

Shouldn't have caved in. There needs to be (and it's justifiable even by blue pill standards) a minimum level of sexual/intimate bonding in the relationship. I'd say sex minimum once or twice a week, probably will be just on the weekends.

I realized this was very stupid of me to agree to and I imediately started acting aloof towards her and not really responding to her texts

Should I cancel on her and go radio silent? What do you guys think?

That's some passive aggressive blue pill shit. Be straight forward and tell her you thought about it more and have realized that you're actually not okay with it.