Marriage advice

Okay so I've been with my husband for three years, some bs happened and he left me and rented a room in someone's house.... he says he wants to hit the reset button and build a friendship, see where it goes. Meanwhile, he wants to be at my house constantly, telling me he loves me and whatever. He's been talking to a woman in Colombia who speaks soanish, he does not and has to use Google translate to communicate with her. They met at his job when she was visiting here... from what I've read of the messages she is trying to ensure hat he is divorced, she plans on coming here soon but is worried and being deported, my personal opinion tells me she's looking for a green card and using him to her full advantage but he is too stupid to see this. Idk what to do, I want my marriage to work but this crap is driving me insane. He doesn't have anything else to offer her or anyone for that matter. [Not to speak bad]