Weird co worker- advice needed

Hello ladies! So I work part time at a store while I’m finishing up college. My co workers are mostly my age, but all of them are great and friendly! 2 of my co workers are dating and work the same shifts, are approachable at work and seem nice. The boyfriend, let’s call him “Chad” has always given me a weird vibe, but all of our co workers go out for drinks (I haven’t joined them yet cause if classes) and are friends. I added them all on snap chat. “Chad” snap chats me at least 3 times a day. Random things and actions, I never answer. I have a boyfriend of 2.5 yeas and I haven’t told him yet because it’s just now becoming a problem.

I want to unfriend him so badly but it will kill my good work environment because everyone is so close. I know a lot of you will hate on me for not doing it yet but it’s just now getting to the point where I’m finding it uncomfortable. Should I tell my boyfriend or just unfriend the dude and if I’m confronted tell him I was uncomfortable? I see him everyday, just to add and i go to the same college as most of my same age coworkers.