SUBREDDIT: r/relationships
TITLE: Me (21M) & Gf (23F) of 2 months, told mom (53F) about gf, mom treats gf like air, there's still 2 weeks left for them to see each other everyday. Help.
POST: First time posting on reddit, english not first language, also on mobile, my apologies for format. 

They see each other everyday, mom doesn't acknowledge gf existence since day 1 they met. Its been 18 days since then and there's still 14 days left to go. Also it's going to be a long distance relationship starting mid November. Gf might not come visit due to how my mom treats her and I can't really go to the country she is in due to family and military issues.  

Question being how to deal with mom? Its stressing me and gf out & also my relationship with my mom isn't really that good to have nice talks.
TL;DR: 
mom treats gf like air, its pissing me off & stressing me n my gf out, what should I do?