Why is he being weird?

I can overthink a little bit. Back in high school I had a just a little crush on this guy. We never tried anything hang out we’d just text. Now years later we chatted up for a month or two before hanging out. Slept together a couple times. He was pretty cool. He’d ask pretty personal questions that kinda made me raise my brows lol I never expected anything from him because I was still “healing” from my past. & didn’t want to force anything kinda goin with the flow. He mentioned being unhappy about his weight gain. Which I never had a problem with but I guess it’s not up to me. He wanted to work on himself so I completely understood that cuz I’m on the same chapter of my life. & never said anything to him after that or tried to see him again. That was months ago! Last week he liked a picture then after dayssss unliked it. I asked how he was doing. He said he was getting better & said he missed me. But he didn’t ask how I was doin so I cut that short lol My birthday was a couple days ago & before that he just will creep & creep! Is that what they call orbit? Or boredom! Lol
Why is he being weird?
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