I think I have a stalker

So I thought I was in the clear since I didn't hear from A all day yesterday. Didn't hear from him until 7:00 that is. Here are the texts I received:

6:53 pm Hey...what's new?

6:57 pm I just want you to know that you really upset me by cancelling plans again yesterday. That's all...other than that I'm cool with things...

7:01 pm A friend of mine had a match.com girl cancel on him as well yesterday coincidentally!? Killers concert!? Anyway...guess it's pretty common these days...

7:03 pm I was only angry because I wanted to see you...anyway off to more dating! Give me a ring sometime ;) ciao!

7:14 pm I just wanna' know what happened after that Sunday. I mean id I say something wrong? Is there another guy (your ex?) I thought we had a good rapport?!

7:16 pm Lauren you're quite a girl but I'm no chopped liver. We could be good together. Aries meets Libra. u should think about it. Things like this don't happen often.

7:17 pm I was telling all my frineds I met a great girl but she seems confused and unsure so I was trying to give you time/space. But I'm only human. I need something!?

7:23 pm I'm going to meet someone tomorrow who wants to set me up with people they know. I'll wait lauren...but not forever...good luck boo ;)

7:27 pm I even wanted to help u with your business. Didn't u read my e-mail. I took u seriously...no joke.

7:37 pm God. Say something...anything...jeez...!? ;)

Should I be scared b/c I am. He knows where my office bldg is. What if he is waiting outside one day when I leave work. Do I write back and tell him to leave me alone or will that only bring on more pathetic texts/e-mails? It's been quiet so far today. Fingers crossed it stays that way.