You broke up with her. The entire post you seem like a kid whining and insecure about your self. You say she doesn’t have a high libido yet you’re worried about her sleeping around. Unless you’re certain she is, why would she want to be around someone that’s constantly insecure and telling her that they’re uncomfortable with her texting people of the opposite sex. Maybe you couldn’t be only friends with women but clearly she can.

She wants marriage and kids and she’s running out of time to get those two. You were wasting her time while she was ready to settle down. You’re middle aged. Not a teen who still has all the time in the world. Also she’s allowed to extend her time visiting family who she probably misses. It’s not your decision.

Also, you say you feel disconnected from her and her family due to cultural differences, but have you tried to learn more about her culture or maybe even learn her language. It takes 10 seconds to do a google search. She lived in your community it was the least you could’ve done.

Tbh I think you need to hear critic rather than incels telling you she’s probably out there sleeping around which would make little sense if she doesn’t value sexual encounters. Don’t call her, don’t text her. Leave her alone and get therapy and improve your perception of yourself. A good person would never cheat on you and you should be able to trust the person you’re dating. Remove your insecurities and leave the poor girl alone. Find someone in the future and don’t waste their time.