My ex is a stalker......?

My ex left me for another girl 3 years ago on my birthday. I stopped speaking to him since then. He still makes an effort to call and even stop by my job. but I refuse to talk to him. He recently text me asking how I was- how creepy is that- they are still together, why is he trying to contact me? ( I still wouldn't talk to him) just asking out of curiousity.