My coworker has feelings for me

I know this guy for a year, he is a great guy. We always have lunch together and we talk the entire time about many things, it's great talking to him.

One Friday his department was having an outing and I know most of the people there, he invited me, I went there. Well, at the end of the night, it was just us, he said he likes me. Thing is... I'm married! I love my husband a lot, I also like this guy. As a friend. I feel wrong all the time now.

Anyone experienced this?!?!?