Relationship problems pls help!?!?!?!?

I think you've done some good things so far. A rule I have is never leave for the night; it's running away from the problem. If you need time to cool, just leave for a few hours. I would talk to your SO and tell her how you can see this other person likes her, but you feel she is being completely blind to it. It's inappropriate for all of the texts. Tell her how it makes you feel. It makes you feel like she doesn't respect your feelings when she continues to text after you say it's uncomfortable. You trust her and know she is committed, but you know the intentions this other person has, etc.