Weird encounter at metro. Should I be worried?

So I take the metro daily and today something weird happened. I was on platform 1 and this guy from platform 2 randomly asked if he could sing a song for me. I just stared at him at first because what. Then he asked again and I asked why and shrugged then he said he is coming over and he actually crossed to my platform. He started saying stuff like he sings really well, just listen to one song, and kept insisting. I was caught off guard and just said ok to avoid making a scene. But then he told me he has seen me at this station before and just wants to be my friend. I told him I have a boyfriend but he said he just wants to be friends and then asked me to come for tea. I obviously said no. Before leaving, he gave me his number and asked me to call him, but I didn’t because I didn’t want him to have mine. Now I feel uneasy because this is my everyday route and I don’t know if I should be worried or if I handled it right. Has anyone else had something like this happen? Should I do something about it?