Yesterday i was hanging out with my LTR of 2 years at her place. She got a phone call from one of her classmates who asked her to go on a hike together. She said no and said maybe some other time, after she hung up she said that this was so weird because he never calls her. I didn't respond I just asked who was that and continued as nothing happend. I didn't think anything of it. But now I am starting to wonder you don't just ask someone out randomly maybe she gave him some signals or something.

Should I ask her about it or just leave it?