Walking while female

A few weeks ago I was walking home from Davis Square along Highland Ave around 10pm. I heard a bicycle behind me on the sidewalk so I moved to the side to let the biker pass me. He doesn't pass. So I glance back, thinking, that's kind of weird. Keep walking. Bike stays very close to me. Comes up beside me, falls back. Still doesn't pass me, despite the fact we're on a flat straightaway, very little traffic, he could comfortably be in the road and on his way anytime. I was starting to get nervous, as I was alone on a residential street and the only business that I knew I could duck into was still several blocks away. Eventually I realize he's making these hissing noises. I glanced back again, and this time gave him a good hard look to let him know I see him. More hissing, more getting close, falling behind. Identify the hissing noises as something to the effect of "senorita". Eventually he also throws a "beautiful lady" in there. Luckily another woman was walking a little ahead of me and I caught up with her and we chatted until he took off. This was about a month ago and I haven't seen him since. - Sarah