I don’t want to lose the friendships but I don’t want to put my relationship at risk either. How do I deal with the temptation?

you don't get it both ways. If you value your connection with your partner you have to give up the extraneous flirtatious friendships - if you value the attention and constant temptation of having a lot of flings you have to give up your committed relationship.

Some people can work well with open relationships, most don't. Just keep in mind if you stay on the fence and eventually do give in to temptation because you didn't want to choose one or the other, you're just going to complicate your situation and make things messier than they had to be