I DONT KNOW WHO DO I REALLY LOVE?

I HAVE MY BF I'VE BEEN W/ HIM FOR 3 YRS. IN THOSE PAST YRS HE HAS HIT ME 5 TIMES...BUT AM USUALLY THE ONE THAT'S STARTS HITTING. WELL HE PLAYS IN A BAND NE HE LIKES TO HANG OUT W/ HIS FRIENDS A LOT I DONT MIND HIM HANGING OUT BUT SOMETIMES HE DOSNT WANT ME 2 EVEN CALL HIM WHEN HES WITH THEM. I ALSO FOUND OUT THAT HE TOOK A GRL 2 HIS ROOM BUT DIDNT DO ANYTHING [?] BUT I REALLY MISS HIM WHEN I'AM NOT WITH HIM OR TALKING TO HIM...BUT THERE'SS ANOTHER GUYTHATT I STARTED TALKING TO AT WORK HE REALLY LIKE'S ME ALOT HE TELLS ME TO LEAVE MY BF AND WE SHOULD GIVE IT A TRY..HE KNOWS THAT WE HAVE HAD UAL AND HE DOSNT CARE AND HE KNOWS THAT HE HAS HIT ME ...HE ISVERY CARINGG ALWAYS ASKING ME IF I' AM FINE CALLS ME JUST 2 SAY GOODNIGHT. WHEN IAM WITH MY BF I THINK OF THIS OTHER GUY !! I KNOW IS WRONG BUT CAN SOMEONE HELP ME OR GIVEME SOME ADVISE ON WHATS GOING ON WITH ME BECAUSE IAM REALLY LOST.... THANXZ ALOT [I KNOW THE GUY THATS WORKS WITH ME FOR 6 MONTHS]