groove on (someone or something)
To have a strong interest in someone or something. Those cute guys are looking this way again—I think they're grooving on us! I knew I wanted to study art, but I didn't expect to groove on textile design so much.
groove on someone or something
to show interest in someone or something; to relate to someone or something. Fred was beginning to groove on new age music when he met Phil. Sam is really grooving on Mary.