bf or lover ??

so i've been with my boyfriend for a year and 5 months. but a couple weeks ago this guy at work hit on me and we hung out after work and got food. totally innocent. except for the fact that when we hung out he was really touchy and now idk what to do. because i have a great guy who i've been with for a while. but i find something intriguing about the guy at work. what should i do ????????