Firstly. That snake will not survive in the wild for more than a few days. You need to try and find it immediately. Secondly. Your girlfriend sounds like a psychopath. This is simply unacceptable. Especially if she moved in with her pets.

I'm feel very sorry for you. 14 years is a looong time. Must have sooo many memories, it must be a very difficult time. And you cannot simply replace it with another pet or a gieko or whatever. Thats even more absurd, that means she has blatant disregard for your emotional attachment with that pet, Its very narcissistic behavior.

If this were me, I'd get out of this relationship. But thats easier said than done. You guys must also have a history together, to have reached the point of moving in.

I sincerely hope you find your snake! Keep us updated please.