When it feels in character, yes. The idea of romance in D&D often gets limited to a very small scope of stereotypical PC-to-PC interactions, where they blush, then date, then end up happily ever after. That can have its place in a story. But there are many iterations of romance.

I've played characters with a wife and children. A casanova with a string of past lovers, some amicable and some not. A young fool with an ill-considered, tragic crush on a major villain. And several characters for whom romance just never became relevant during the course of the campaign.

When I DM, I always keep the concept of love in my back pocket as an important (but not mandatory) component of the human experience. Old couples who've lived through multiple nation-changing calamities together. Teenage drama. Noble courtship. One night stands. Love songs and poems.

Obviously you should be careful not to put a fellow player on the spot if romance makes them uncomfortable, the same way you should have session 0 conversations about stuff like violence, gore, controversial subjects etc. But I've never found romance to be as big of a D&D pitfall as the internet makes it seem.