Younger Man

My story is that I have a boyfriend who we have been together for almost 7 months. I am really happy to have him in my life. Nevertheless, this past weekend I met a guy in my uncles wedding (really handsome & gentleman, who btw is 6 yrs younger than me, I'm 25 he is 19 yrs old)  who we got to talk and dance. Yeah, it's sound crazy to think about an immature guy at that age but he was different. We connected and both exchange each other's number. Now, he text me after few days that he want to go out with me. What should I do, should I go out with him or not? I honestly can't stop thinking about him, I have never felt this way in a long time. I can't explain it. Still I think of my bf he doesn't deserve that. Any advice?