I fell in love to someone I shouldn’t

I know I might be the dumb person here but I need an advice how to move on, I’m trying to, but I just feel like i’m merely. I have unconsiously fell for someone I shouldn’t. I don’t want to admit it to myself so I keep telling myself I didn’t fall for him but I think I did and I just can’t accept it and it’s too complicated and I am in the worst position ever. He is my boss, he’s married but his family is living in a different country far from him. and he has a girlfriend in our city right now. They’re in a relationship for almost 10 years. During covid, mid 2020, his girlfriend went to her hometown and stayed there until 3 months ago. But during that time, I had to stay in the staffhouse together with him to do work from home since it is not possible for me to have a fast and reliable internet at that time. So for 2 yrs, he took care of me, of course I know i am not his girlfriend, though we slept together, but didn’t have sex, just touching each other hugging. and he always tell me i will never and can’t be his girlfriend, and of course I know it and I didn’t think that I will be his girlfriend. I know he let me sleep with him to mentally survive the lockdown that is happening. Fast forward, I went back to my own house 3 months ago because his girlfriend went back to the city but it seems like I keep thinking about him, keep getting sad because I have no one to hug or someone taking care of me. I try to ignore it cause it might be because I just got used to his presence and care and try to find a real boyfriend of my own, of course someone who’s not commited and in a complicated relationship. I don’t want to be the third party in a relationship but why is my heart and mind keep thinking about him even though I try not to. Should I just quit my job to move on easily with this complicated feeling I have? How to move on?