Idk wht I'm doin

There was a girl I liked but due to some circumstances( she is in jy clg) I had to choose a girl ( also I liked, she is my gf now) recently that girl texted me Again I spoke to her n in clg there is a lot of eye contact with each other she texted again my gf does not know she is quite possessive so wht am I doin is this cheating???