Tips for getting over a coworker?

He has been on his phone a lot more recently. He doesn't really talk to me if our other partner is present, but will strike up conversation when he isn't. He speaks really soft to me, is always ready to try any ideas I have, but he doesn't tell me as much as he used to (before COVID).

Yesterday, he was on the phone with some girl and when he saw me, he told her "I'll call you later" then hung up. So, yeah...

Any tips on how to get over him FAST? I only work with him Saturday and Sunday, but 6 - 8 hours.
Tips for getting over a coworker?
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