My ex dumped me yet hes creeping on me? help?

[Aliciahi5]

-we dated for 2 years, both are 22 years old. He dumped me cuz he lied alot and said he lost feelings for me..the breakp was 5 months ago and we havent spoken to eachother in 3 months .

-i deleted him off my facebook 3 months ago, and on christmas he sends me a friends request and messages me saying merry xmas and he put 5 kisses after that, wth?

-he made his best friend message me and he was asking me about what im up to.

-Whenever i like a post on fb then he likes it too after me.

-and he has been calling me on private every now and then.

why is he doing these things? he dumped me and assured me that there wont be another chance... this is very confusing..help!