I love this forum, so much great advice, thanks everyone!

The first 2/3 of this I was in complete agreement but dont understand the last part about bringing doubt and jealousy into it. Seems like you want him to be honest and open and empathic but to still use jealousy to keep her. Maybe you can clarify. Should he drop the games he may have been playing (dont know because she might just be a bitch, the OP has to look at his actions and if her reactions are justified) or should he continue to play games?

We talked this through, I told her I understand her behavior and that we should support one another in a relationship, she almost cried out of excitement

Things looking out good, I don't think I should bring in any jealousy, she reacts really bad to jealousy.

Update

As I was coming back from the gym, she called me and started telling me she's getting ready for a little "get together" she's having. I showed no emotion what so ever and told her "awesome, have fun" and changed a subject right away as if I didn't even hear what she said.

A bit later she asked me "you don't mind right I'm going out this late right?"
-"oh, right, where does a little girl like you goes this late at night?" (it's 11:30PM right now, and tomorrow is Sunday - we work on sundays...)
"oh...Don is having some friends over and he invited me too"
-"cool. have fun"
"I wanted to see how it's like going out alone, without you"
-"well, don't forget to have some fun through those plans" (cocky)
"yeah...I wanna see how I feel about it. If It'll be OK then I will continue going out with my friends without you"
-"I don't understand your reasons but whatever, what are you planning to do with the information?"
"I just want to feel how it's like going out without you"
at this point I felt it's a shit-test and decided to calling her on it
-"I hope it's not one of your tests to see if I care for you, like that time you told me you're going out on a club alone just to hear my reaction" (which was "have fun")
"no, it's not. I'm really going this time. talk to you later, I have to go"
-"we haven't finished the conversation"
"BYE. good night"
-"ohh. I guess I shouldn't expect a call from you then? good night."

well, it's good she wants to go out without me. more freedom for me.
I'm not threatened by Don, he's a pussy, and his friends talk shit about him in front of his face (major DLV) and she always tells me about it. The thing that bothers me is her behavior.

Maybe there's another guy (one of Don's friends).

Edit:
She called me and said she decided not to go. Weird.

Well I guess its good she didn't go. But I will say the end of the convo is pretty weak on your part. Telling her the convo is not over is weak and you basically asked her if she was going to call you later, super weak. If she goes out without you just say have fun and leave it at that. You act like its some kind of Competition between you two of who can go out and have more fun without the other one around. From now on just act unaffected and be cool, next time say" Tell Don I said hey"!

One more time.

If you're not more assertive, she'll shit can you.

Take responsibility for your own happiness Bro.

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