Co Worker Situation

I need genuine outside opinions on this because I feel like I’m going insane trying to understand this situation with my coworker.

A few months ago me and this guy from work got really close. We went to an amusement park together, watched a movie together, shared music constantly, made out, held hands, etc. He told me he was interested in me and would talk to me a lot. We had really good conversations and I genuinely felt a strong connection to him as a person, not just romantically.

The important part is that he was already talking to another girl during all of this, but the way he talked about her made it seem like he either didn’t like her that seriously or wasn’t fully committed. He would say confusing things that made me think there was still room for me in his life romantically. So naturally I started developing feelings because his actions toward me felt very real and intimate.

Then eventually he “locked in” with her officially and everything changed.

He told me we could still be friends and that he still thought I was cool, but ever since then he’s become progressively more distant and awkward. We never text, barely talk at work, and he says things like “that’s just how I am, I don’t really initiate.” He also keeps saying stuff like “maybe later” or “eventually” when it comes to hanging out again.

The confusing part is that his behavior still doesn’t feel fully indifferent to me. I constantly catch him staring at me from a distance at work, he views my posts on social media almost immediately after i post them, likes reposts, notices me instantly in public, etc. But when we’re actually near each other in person he becomes super awkward, short, avoids eye contact, turns away, or acts weirdly avoidant. It feels like he’s hyper aware of me while also trying not to engage with me too much.

At this point I don’t even care about the romance stuff anymore. I’ve also been avoidant towards him out of respect for his relationship. I’m honestly just hurt because I genuinely liked talking to him and being around him. It feels like I lost both a romantic possibility and a friendship at the same time, and I can’t tell if he hates me, is conflicted by me, or whatever it is.

I genuinely want honest opinions because the mixed signals and awkwardness have been emotionally exhausting. I need some advice on what to do, if I should even do anything at all. Feel free to ask any questions because this post isn’t much detailed lol.