Is he teasing me to flirt or just bored?

there's this guy I work with (I kinda like him but I’m shy. He’s a little older than me by the way). Whenever we cross paths, or if he comes into the area I’m working in and I have my back turned to him he almost always will say “hey Kate!”. If it’s not that he will say my name in a funny way, like a teasing tone. Sometimes high pitched and sometimes drags my name out when he does this. He always initiates conversations when we talk, never me cause I’m shy and don’t wanna act like a moron. Is this just him being bored and passing him or is he being flirty? I don’t wanna read too much into it if it’s not.
Is he teasing me to flirt or just bored?
Post Opinion