<human>: We met through mutual friends. This circle of friends has told me he is the type of guy that will still go out looking to hook up with people while seeing someone. I'm not okay with this, as I'm a strong believer in "one at a time" and have ended things with people before over this. The entire group of friends is surprised we're dating and sees me getting hurt/screwed over in the process because of this. It's only been 3 weeks, so I feel like it's early to have the talk about exclusivity yet, as in previous relationships that hasn't happened until at least a month in. Also, all my previous guys also believed in he "one at a time" thing, so there was never really an issue to begin with. Our dates have been fun, but not spectacular or anything. I don't really get the feeling that he's trying to impress me or woo me and he's a little bit too serious and boring. But there are positives too. I still need more time to see where this could go, as I know he's looking for a longterm relationship and I don't want to give him the wrong impression until I'm sure.
So how do I approach this? I'm not at all comfortable having the exclusivity talk since I feel like it will scare him away. Neither of us talks about anything longterm with each other yet and we're still not comfortable with each other. I just don't know if this should be a dealbreaker?

Summarize the given text in a few sentences.
<bot>: I've been seeing a guy for 3 weeks and he may be seeing other people on the side but I don't know how/if I should bring up that I'm not okay with it at this point?