Yes, you should directly tell him that you do not ever want kids. Clear communication is vital for marriages. It is also something you should not give in to just because he wants them.

>he treats me like shit
>
>makes no effort to spend time with me
>
>good liar and constantly gaslights me

These alone are break up offences. You do not have to put up with this. You are not stuck. Make an exit plan and follow through. Start with a part time job and stop catering to him at home. He's an adult and is responsible for himself.

Anytime someone says "if you love me, you would do..." it is a manipulation tactic. It works because you love them so you feel you need do whatever they are asking. The truth is, if you were in a healthy relationship, there would be openness and trust. You are not in a healthy relationship. This is not worth your energy.

I read this because I hate that women fear revenge and wanted to support but I'm afraid I just see avoidable drama here. It's not going to go well for anyone any which way. You're gone in two weeks, why not focus on something else?