At the moment I have a FWB who is pretty slutty. She fucked 15 guys in the last 10 months. We're not exclusive in any way and I know she's sending nudes to other dudes while we talk etc.

She said multiple times she likes me very much and wants to continue seeing me for a long time. However, I have problems with the fact that she's acting very sweet, almost acting like we're a couple, but on the side fucking other dudes.

What are some tips to not let this affect my thoughts negatively and fix my mindset? A obvious one seems to be for me to also chase other options, but it seems like I can't focus fully on those other options while she is still in play.