@ehBeth,
I suppose these things are culture-specific, to a degree.
There's this TV series we're watching, called Tunnel. Set in and around the Eurotunnel (Channel Tunnel), it's always about some spectacular murder case involving both the French and the UK police. The plot is often illogical, but I love the characters. The main French cop is a 30-something woman who is incapable of much social interaction, to the great chagrin of the English cop who tries to teach her some inter-personal skills. Like saying "hello" to people...
She is in this purely sexual relationship with a bar tender. The poor boy progressively develops a liking for her, but she keeps treating him like some disposable sex toy. Anyway, slowly slowly she learns to trust him and to trust her own feelings for him... It's nicely done.
I like it because in my experience, it's usually the opposite: the boys don't want to commit, and the girls want something serious and lasting.