How do I approach myself to him?

There’s this guy at work that I find attractive out of nowhere now. We been working together for 2 years but I’m now having a crush. We don’t ever talk to each other at work but lock eyes sometimes. He has a friend that has been trying to have sexual intentions w me, and he also talks to my ex but I won’t consider them as close friends. I wonder if he finds me attractive and I’m too scared to get rejected by him and later too embarrassed to be working with him as well. I don't know how to go about this or how to approach myself since he talks to my ex and his friend is the one coming at me.

How do I approach myself to him?
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