Is she a real ex psycho?? HELP?

Ok, I've been in a long distance relationship for almost 2 years now. Lately things have been real bad between us, And finally I decided to break it off for good. Well I blocked her from texting me today, unable to block her.She called me ova 100 times today and left a gazillion messages crying, saying she cant live without me etc.... I did not call her back. When I got back to work from my lunch she had sent me Flowers to work!!! Same day delivery?? with a nice card saying how much she loves me and is sorry. I didnt call her or text. So she decides to call my work!!!!!! For several hours my work number kept ringing with block caller, I know it was her... THe thing is it was beginning to bother my co-workers cuz they were getting them calls tooo!!! I txt her and told her to stop????? What is that? is that like crazy or what??? She denied it was her calling my work, but Iknow it was her!!!! I feel the only way to keep her calm and not psycho is by txting her " we'll talk later" help me....what do I do?????????