<human>: My GF talked to "an old guy friend" who she has some sort of sexual un-disclosed history with before me, over Christmas by text. They were catching up about high school apparently, as they are "just friends." I was out of town for the holidays. He asks her on dates and she declines. I am not accusing her of cheating on me.

I brought my discomfort up about him and another situation in Feb. Without telling me, she blocked him after our arguement. We broke up 2 weeks ago, she deleted the photos of me on Instagram, and we were back together a week later.

We were looking at movie times on her phone and I was looking over her shoulder at her phone. She got a "message request" from him on Instagram. I openly said "OKAY." because I know it's sketchy and then about 2 minutes later she's like "okay just say whatever you're going to say."

I told her to open the message. It read "I'm assuming you got back together with him and he made you block my number." So they obviously haven't talked in a while, since she did block him and he just found out now. I'm assuming since Christmas.

She told me "I haven't done anything wrong. I can't control what other guys do." I get that, and I get she's a good looking girl and guys are all over her, but for some reasons, I feel she led him on. What do you think of this message that he sent? He shouldn't even know he's a topic in our relationship fights, so I don't know why he'd assume me. Also, how did he figure out we weren't dating? I guess since she deleted all ~10 photos of me on Facebook/Instagram? What can I take away from this?

Can you give me the gist of the text in a nutshell?
<bot>: GF got a message from a guy saying "I'm assuming you got back together with him and he made you block my number." and not really sure what to think of it.