Hello guys I'm in a really weird situation I'd love to hear your advice on my situation.

I'm a single mum me and my husband started living separately about 2 months ago. Before we decided to live apart, we would frequently go
to the supermarket together. I'd grab some fresh fruits and vegetables along with few other bits and bobs. At the supermarket there would always be this guy hes a security guard there and he would occasionally glance over at me I didn't think much of it at the time I was going through ALOT of stress so also I reckoned it was his job? so I'd carry on with my shopping and head out with my ex husband. Its been 2 months I've been going to that same supermarket getting my grocery done quickly and I happened to bump into him he stared deep into my eyes i looked up and glanced down, I was quite surprised because I don't normally get guys staring deep into my eyes whilst walking past slowly with a buggy I don't know. what I mean is he probably knows I got a husband (doesn't know my personal business that we are separate)and a kid in the buggy so whys he starring at me like I'm the only woman there I don't know what to think of it. why would he look at me like that. I'm attracted to him too I feel kinda embarssed how do I talk to him how do I go about it? I'd love any advice from you guys x