Hello Community like I said in the headline I have a problem with an unmotivated player. Here is some context( I have to excuse myself for my bad english, I know it's bad.):
I recently(2-3 Months) started GMing(Sry I don't know if this is the right word) a game with 3 friends of mine. In the first month I played with my group everything was ok, but recently, since now nearly one month ,it feels like one of my players is suddenly starting to loose interrest in pathfinder. He never was someone, who thought roleplaying was fun, but he started playing pathfinder and found it "strangely fun". He is suddenly loosing interrest, like I said earlier, and I don't know why. I asked my player to write charakter storys and goals( something they would like me to include in the campaign). Since I felt like he was loosing interrest I started focussing on his goals, so that he may find his fun in playing the game, since really love playing pathfinder i would find it sad if he would stop playing.
Recently he always is on his phone or laptop doing something else than pathfinder and only sitting there staring at his screen not even paying attention to what i am saying.
Can somebody please tell me a good way to motivate a player?
I am begging you to help me.