<human>: This is quite a silly question compared to some here, but it's a tricky social situation that I could use advice in navigating. Me and the bf have been dating 1 year, we don't live together. I live about 1.5 hours away, so it's difficult for me to hang out with him during the week. His friends and ex mostly live close to him. His ex is well established in the friendship group, she was in the group before they started dating.

After he broke up with his ex, he avoided the friendship group for a while because it was quite awkward, plus me and him started dating soon after. She started dating someone else in the friendship group since then. Although that was weird for a while it's becoming less awkward over time. I have met his friends a few times, but not very often because I can't be around during the week when they hang out. I have met his ex a couple of times as well. When we've hung out we talk more to each other than our own bf's.

So me and the ex got on well, we're friends on facebook and she keeps liking my photos (even of me and the bf). My bf thinks this is a calculated move, he's not sure why, possibly she's trying to be my friend. She never ever likes his stuff. My bf bumped into her recently and she said she was going to invite us out with her new bf and some others, but she thought that I wouldn't be able to make it cos it was a weekday. So, she didn't invite him at all, i.e. she would only have invited us. Then they made vague plans for all of us to hang out next time I'm around, she literally told him the times that she wasn't available at the weekend, so we could work around them.

So I guess my question is: what is the ex up to? She seems to be reaching out to me perhaps? I'm basically kinda confused. She's literally the friendliest towards me out of all his friends. What should I do? Should I reach out back? It's all so weird!

Give me the gist of the text in a nutshell
<bot>: bf's ex seems to be really friendly towards me, more than any other friends. Not sure why. Not sure if I should make an effort to be friends (beyond being casual friendly) given she's the ex.