Was I sexually assaulted

So me and this guy have been talking for a few months he came over to my house the other night we were sitting around talking and we started kissing I just wasn't feeling it so I tried to walk away and as I was walking away he grabbed my face and proceeded to kiss me more and shoved his tongue down my throat. I got away and turned around to walk away again he grabbed me from behind proceed to put his hands down my pants I was telling him no stop and trying to move his hands away from me but he kept going trying to get his hands down my pants telling me to stop. he never actually put his hands down my pants because I wouldn't let him but he got up and just left he was very upset and so was i!! I don't know if that's actually sexual assault or not?