Should I end our friendship?

So I was catching feelings for my friend who is also a co worker, my feelings for him started to happen when he started to flirt with me, and also my mom and friends would also call it, " love taps " They all thought he had a crush on me as well and they're not the type to get my hopes up. But now I found out he has a girlfriend and she makes him save messages and she was pissed and told him he couldn't talk to me at work anymore, but this was all new to me because the day after I confessed to him It felt like our bond became a lot closer than before. Now I feel guilty and even though he's still wanting to talk to me, I don't know if I want to talk to him. I don't want to ruin his relationship with his girlfriend, I even tried telling him that maybe we shouldn't talk anymore but he didn't want that. Tomorrow I have to see him at work and I just feel like I shouldn't even say hi or good morning to him.
Should I end our friendship?
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