Complacement while in a casual relationship

Have you ever felt complacent when you are in a casual relationship?

I've been casually seeing a woman as a fwb which can feel romantic at times, where she told me to gain more experience with other women.

But I am lacking motivation to text women I exchanged contacts with because I already have a nice thing going with her.

Even though logically it makes sense for me to gain more experience as I am a late bloomer in mid 30's. (Was a kissless virgin until last month)

Note: I first met the fwb at a bar where she just did all the initiating and leading for me so no seduction skill was needed.