So me(18) and my boyfriend(21) met on tinder we have been dating for 4 months and we spend every day together but lately he has been acting different he doesn’t want to be close to me anymore and he usually gives me his phone when mine dies when out in public but lately he hasn’t and he gets mad when I ask.It even seems he is not sexually attracted to me anymore and never tells his friends he’s with me he always makes up a lie, could he be cheating