((((((:group hug:

Doglover )))))) Sounds like there's a backstory to this - not sure how long your relationship has been going on but sounds as if you need to talk to a therapist fast because you're so upset.
If there's a long, supportive history there it shouldn't be that easy for your partner to just get up and walk away.
Encourage you to talk to a therapist soon.

Let us know what happens.