Does he like me?

           Moved to a new country for a job recently. I usually take a bus to the office. One of my colleagues also takes the same route as me, that’s how we started talking to each other. He’s very caring and helpful, also showed me around the city and helped in finding an apartment. I do enjoy talking to him a lot and im assuming he does too as he promptly replies as soon as I text him. The conversations are still very normal and friendly, although I feel a certain tension between us, also caught him eyeing me a couple of times when im not looking.
           During a recent conversation with him he casually mentioned how he is in a relationship since the past 3 years. This came as a shockk to me as he had never mentioned about it before. I have tried to ask him very casually about his relationship to which he responds either by making negative connotations or finding ways around the topic. I did develop a lil bit of feelings towards him as he had been nothing but caring and helpful but im very confused now. I don’t know if it’s just him biting nice or does he have similar feelings too. I see him everyday to and fro from work and this thing has been bothering me now.
Should i speak to him regarding this or is it a bad idea?