HOW CAN I FIX THIS?

I work with this boy I think he might Like me, but I have a boyfriend so l've been trying to keep my distance and I also had a small crush on him he texts me all the time so I try not to respond much and I ignore his message so feeling can’t escalate he was telling me that he won't be at work for a while and then l ignore it then he told me his dad passed away and I feel terrible I keep texting him check up on him because I feel really bad for ignoring him before I genuinely feel so guilty and sorry (I suffer from MDD and I sleep a lot because of it so sometimes I'm not even ignoring him)

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1 y
He does know I have a boyfriend I told him a long time ago also I had a crush on him not have or has past tense before I even met my boyfriend
HOW CAN I FIX THIS?
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