Am i wrong for being friends with an an highschool aquaintance ex?

ok i am a sophmore n college me n thisgirl was cool senior yr nhigschool we was both n the same homeroom and n 1 cl together we was jus cool we didnt call eachother txt or hang out like buds it was sort of like a hi n by laugh n cl das it.she broke up w. her bf bou a month ago i tried to ask her why she didnt realligive me detail. so i ked her bf. ever since we been cool we txt talk alot he calls me at night even calls me on his break at work txt me when he wake up n stuff. he came 2 c me once at my job das it. does it sound like he likes me? am i wrong for being cool wit him?? and talking to him wayy 2 much?? he calls me his homie do uthink this homie word is a cover up that he may be feelin me a little bit?besides i have a bf so nothin will ever go down between us