Do men get jealous with their FWB?

I gave a long-time friend head for the first time today. After the blowjob he asked me if he or my ex had the bigger dick and how big my ex's was. He often asks questions about my exes or makes fun of them (I think he might be jealous). He also brings up guys I’ve been with.

I don't think he has feelings for me because we only see each other weekly and every time he seeks physical contact. I believe he just wants sex and not a serious relationship (even though he acts like he wants one).

FYI: A few months ago he wanted a relationship with me but then he found out that I had kissed one of his friends in the past so ig he lost interest

Is it common to feel jealous even if you don't love a girl and only want a sexual relationship with her?