What does it mean wen u cant seem 2 get ova a person?

i think about dis dude lik allllll da time lik...i dont know if its because i have nothin else goin in my life but evrytime i get quiet time my mine goes 2 him....its a real complicated situation we use 2 have jus a sexual relationship. but i thought it was gona eventually turn into somting serious but it didnt. and i told him 2 stop textn n callin m3... but my fone is off so if he did txt m3 i wouldnt kno im jus so confuse because on 1 hand i think i derserve better but im sooooo deep in love i dnt kno wat 2 do its drivin m3 crazy please help!!!!