is this normal 😰 married man

So basically I used to work with this guy that I had the biggest crush on ever. I never pursued it because he's married. Eventually he ended up leaving out job (3yrs ago ). I am still at this job and today he called into my job and I got so nervous and my anxiety heightened I couldn't even talk, I ended up passing the phone along to my coworker 😰😰😰 is this normal to feel this way after three years? Idk why I am still so obsessed with a married man