Breaking the ice or just accept the awkardness?

I recently had a awkward one night stand with an ex colleague. we had been flirting when we worked together but nothing never ever happened as he got back an ex briefly whilst we were in this flirting stage. however as it had recently ended with his ex we recently matched on hinge and hooked up. However when I went round to his he said that his flatmate was coming back shortly, i didn't think anything of it until after we had sex, when he mentioned again that the roommate was coming back. I took the hint and awkwardly left and whilst i was leaving he said he felt sleazy kicking me out. We kind on ended it on okay terms, however when we next saw each other it was a bit awkward and I didn't really make eye contact. however we had a chat and we agreed that we were both in different places for what we wanted.

as we have a few mutual friends, we have seen each other every now and then, i feel like i have tried to be friendly and say Hi/start a conversation, however apart from the general Hi or how are you we haven't really spoken and it felt like he was avoiding me in group settings

We were at a friends party recently and he was a bit more chatty, and felt like moving past the awkwardness a little. But i randomly saw him today at the pub i used to work, at where he works after few months of not seeing each other. I was on my phone on a instagram scroll so didn't see him right away, but when i did we said hi/how are you as he walked past, however as he was working he didn't stop to chat much. I then noticed that he kept ignoring me the whole time, didn't look at me at all, kept his back towards me. This made me feel a bit anxious and like i couldnt start a conversation
I do want to reconnect as friends but am not sure how to break the ice and it feels like we can't get past the awkward stage.
i get a bit awkward as i still fancy him so not sure if its the same with him. Has anyone got any tips on breaking the ice.

Breaking the ice or just accept the awkardness?
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