He never mentioned his girlfriend while I was flirting with him thoughts?

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I met this guy online about two years ago. We became friends, stopped talking for a while, and recently reconnected. I've always had a crush on him, and after reconnecting, it got stronger, so I started dropping what I thought were subtle hints.

I was usually the one initiating conversations, but once I did, he'd engage and we'd sometimes have really long conversations. He'd also occasionally send me reels, and during conversations he'd share pictures/updates about his life. We talked about everything from social issues to random personal stuff.

The thing is, he had a girlfriend this entire time. They've apparently been dating for about a year, and he never mentioned her during the month we'd been talking.

Then he randomly told me his girlfriend was upset because she'd gotten “the wrong message” from our friendship and asked if I'd talk to her.

And honestly, I can see why. I was being extra friendly/flirty because I genuinely thought I had a chance.

There were also SO many opportunities for him to mention her. For example, we were joking about a woman being paranoid about him bringing a girl over, and I said something like, “Just tell her as long as it's not your daughter, I wouldn't mind dating your daughter.” He could've easily said, “Haha, I have a girlfriend.” But he didn't.

Screenshot 1:

We were talking about how much I talk/yap, and I told him sometimes he makes me feel like I talk too much. He reassured me that he actually likes listening to me and enjoys the conversations we have.

Screenshot 2:

We were joking around about Gujarati aunties, marriage, and caste. It was just a very casual and comfortable conversation, but in hindsight.

So now I'm confused.

Was I actually being obvious enough that he should've realized I liked him? Or did he genuinely just see me as a friend and interpret everything as jokes?

I don't want to villainize him because technically I never asked if he was single, and he wasn't really initiating conversations or pursuing me. But at the same time, why wouldn't he mention his girlfriend when the conversation was clearly getting a little flirty?

Did I completely misread the friendship, or was it weird that he never disclosed he was in a relationship?

Reddit, please be brutally honest because I don't want to make the same mistake again. 😭