How do I know if I love him back?

WELL I KNOW HOW YOU FEEL BECAUSE IM TALKING TO THIS BOY AND HE TELLS ME HE LOVES ME ALL THE TIME BUT I SAY IT BACK WHEN I REALLY DON'T MEAN IT IN THE SAME WAY HE DOES SO IM TELLIN YOU NOW GIRL IF HE SAY'S JUST LET HIM SAY DON'T LET HIM PRESSURE YOU INTO SAYING IT BECAUSE ONCE YOU DO THAT GIVES HIM HIS Q THAT EVERYTHING IS ALL IN GOOD NOW. AND ITS GOING TO DRIVE YOU CRAZY BECAUSE YOU DON'T REALLY MEAN IT AND WHEN ITS TIME TO BREAK UP IF THAT IS TO COME UP ITS GOING TO BE VERY HARD TO BREAK UP BECAUSE HE IS GOING TO THINK WELL I THOUGHT YOU LOVE ME AND ETC. SO IM JUST TELLING YOU IF YOU DON'T LIKE THIS GUY AS MUCH HE LIKES YOU OR YOU DON'T LOVE HIM AS MUCH AS HE LOVES YOU YOU SHOULD GET OUT OF THE RELATIONSHIP EARLY BECAUSE IF YOU KEEP GOING IN THE LONG RUN YOU'RE GOING TO BE SO CONFUSED AND HURT.