I am 22 year old male. A 30+ year old male living next to me left a note on my door tonight. I didn't get to the door fast enough but the note read, "Use me". At this point I am creeped out and being vigilant. Thirty minutes go by and i hear someone on my porch and I rush to the door. As I open the door this man is leaving a second note that read "Ok, now your my bitch" and he ran back to his apartment after I opened the door. I ran after him and found his exact apartment two doors down from mine. I'm wondering what legal options I have moving forward? Would this qualify as harassment in the state of Texas? Thank you for any insight to actions I can take. Very creeped out and uncomfortable by the whole situation.