Alright I'll start it off from a certain point. There was this guy who had followed my gf on social media and she followed back, well I noticed about 2 likes as I have him a mutual follower too and it came on my news feed.. Didn't go much into it deep, but the dude is someone who flexes kickboxing on instagram and stuff, and I heard from a close friend he said that I bring my gf on my shop(she might drop sometimes to just say hi and go but the kid obviously made it a big deal) so I confronted him, threatened that if I hear anything else he's toast, he succumbed and followed up explaining that my friend started the conversation about me (nice 'friend' also) and even called me to apologize and explain it's not what it looks like, then I brushed it off.

My gf knows of this event and unfollowed the guy when she heard what he speaks etc.

Next thing I know is a few weeks later, she calls me and gossips about a girl she and her group don't like but she insists following them, and tells me that he guy pumped and dumped her and she's obviously flexing it for some reason, I let her speak and she proceeded saying what a mess (the girl is kinda fat and attention whorish) I change subject and let it go.

I noticed about 2-3 times my girl and he might look like they're going offline almost at same time, like for example 2 hours ago..This looks fishy. Today she told me she had her temperature high again and was sick, it happened two times and once I visited her at the hospital, but today seems different. It's 3rd time I see the offline thing with a difference of about half an hour I think. I call her to see if she's okay, chat for a min. then she says "I gotta go cus dad is coming, I'm on the car and we're going to the hospital" I say ok, says we'll speak on text messages, I go yeah we'll talk on messenger(I know for a fact she got mb but turned them off) agrees, and after a while I text her sth irrelevant but she's still offline. Smells fishy here, is it what I think it is? How to deal with this stuff?