Gonna try to condense this and keep it short as possible (she's is a little unstable)

SHE'S IS A LITTLE UNSTABLE

I really should not have to say anything more, but...

"A little unstable" translates into crazy chick now but results in BAT SHIT CRAZY after a relatively short period of time. Is a piece of ass really worth the amount of headache that can be wrought by a chick that is "a little unstable?"

Why aren't you fucking someone else? Bro... if you aren't fucking other women - and hanging out with your one girl... you're in a relationship. Stop that.

Don't bullshit yourself, you want the pussy. You don't have anything else so you're stuck on her. Decide if you are ok with a relationship with her or not (she will be fucking others and rub your face into it and you sound like the type to react to that power play)

She's not your gf so you shouldn't get butthurt about any of this. She's a good sex partner, I'd let her come back for that. Don't put much effort into it though, let her come over when convenient for you. If she gets on her phone and ignores you, tell her you have things to do and it's time for her to leave. Or with any behavior you don't tolerate, don't get mad or explain why you're upset, just tell her to leave or if you're at her place then say you have something to do and leave, she'll get the message.

I wouldn't put much effort into her unless she starts treating you better. Let her come over for sex when it works for you, and go meet some other girls in the mean time.

Hard next. She sounds like a fucking nightmare. And dishonesty is ALWAYS a deal breaker.

Guys, stop being thirsty. Have some dignity. Never reward bad behavior.

This is partly on you for blurring the lines between "plate" and "FWB". If she's so retarded that communication is a no-go, why would you enjoy hanging out with her besides just sex, and why would you upgrade her from plate to FWB? If you just kept her in the plate zone, there wouldn't even be an issue here. You would fuck, go separate ways, and then she could hang on her phone as much as she wanted, without you getting annoyed. So why are you getting this involved? A brewing oneitis perhaps? That sweet validation? Lack of other options?

Only way to fix this is to marry her.

saying she loves me, saying that we are supposed to be together and she doesn't want to talk to that other guy anymore

Lmfao he 99% chance nexted her and she doesn't want to sound like a loser and so she's crawling back

but another part of me doesn't want to put myself in that situation again,

I understand if a girl I'm not committed to is fucking another guy (after all, no commitment) but having her overtly show she's got a favorite and having it impact time spent together is a huge fucking deal-breaker

Part of me wants to take her back because I really liked hanging out with her and having sex with her,

Well, I could see how wanting to fuck her more would make you want to let her back. If you let her back, be sure to kick her out immediately for poor behavior. If she sends a text, whatever, but if she's glued to it, etc then kick her out.

You should have kicked her out before, not tolerated it

Just tell her the truth. You don't like being disrespected. If she does it again, it's over forever. Keep in mind that, due to solipsism, she'll be thinking it's about commitment or jealousy or whatever would make HER ghost somebody. So you'll have to set clear boundaries about disrespect.

It has been a week since I ghosted her and she has been blowing up my phone day and night, like 30-40 texts/sexy pictures etc PER DAY, begging for me back, saying she loves me, saying that we are supposed to be together and she doesn't want to talk to that other guy anymore, telling me how shes crying all day, having panic attacks, saying she wants me to own her pussy, how she will never be able to forgive herself for this, saying she wants to be my girlfriend, etc.

She's one of THOSE.

She wants what she can't have, and treats what she has like shit.

She completely didn't understand the problem in the first place,

She 100% understood, the whole "don't want me to have friends" was an obvious lie/distraction.

So IDK what to do. Part of me wants to take her back because I really liked hanging out with her and having sex with her, and she apologized a lot and what not, but another part of me doesn't want to put myself in that situation again, where I am feeling like shit and feeling like the second option, feeling taken for granted. I haven't responded yet.

She's terrible, aim to find better in time.

Meanwhile, if you want to fuck her, remember that you have to be distant, non-committal, disinterested and limit your commitment. See her for short times, fuck her, ignore her. This is what she responds to. She's a shitty person because of it, but might as well keep fucking her.