How do I know if the local sales associate is gay & where do I go from here?

So, a couple of months ago I started work in a new area. One day I decided to check out the other local stores and went into a popular health food chain & my eyes met with the incredibly handsome sales associate. I walked around & noticed he was still looking over towards me, so I grabbed something random then went over & asked about it. I proceeded to the checkout & although I was next in line, he came over to the till to serve. He looked up with the cutest half smile & I was weak. The best feeling I had experienced in such a long time, especially having been single 3 years & a lack of self-esteem/body image issues & overall just wanting to escape the whole online gay scene, it gave me hope. I went in a second time & got the same smile. This time he talked to me about their app and knocked something over which was again just really cute! But one time I had finished work, I was walking back and we had missed each other by a few seconds, walking past each other in opposite directions but I had noticed he was with a woman :/ could be a female friend or colleague? He came into my work another day (which is also a sales based position) and it was my turn to serve him. I tried to make conversation and have done so when going in to his store which has sometimes been one sided. So now a few days ago I went in to see him & yes I now realize I've become accustomed to buying random stuff just so I can see him again, and I'm in the queue hoping I get to checkout with him (sometimes I may have left the queue and pretended to look around again just so it's my turn to see him) and yes! With my random health product in hand, he sees me and gives me the smile. Just as we were finishing the sale, he asks me how things are at my work! We actually spoke more and turns out he applied for the same position before he got his current job :D He just really makes me happy. His smile, his beard, his eyes...I just wanna grab him and cuddle him so much :( He's like the ideal guy for me & I've always wanted to meet someone in person. I had a previous experience where I had eye contact with a guy on the train and ran after him and managed to get his number. I had never done anything like that before as I'm quite shy. Turns out he was already partnered :/ I don't want the same situation finding out he's already partnered (with a guy or a girl) but then I don't want it to pass by and never knowing, but I just don't know if he's gay, if I'm reading the signals wrong and he's just being friendly? I can't stop thinking about him. What do I do?