A few things to help a happy relationship:

YOU SHOULD TELL YOUR GIRLFRIEND IF YOUR SHAGGING A GUY ON THE QUIET .

DON'T TELL BOTH OF THEM THAT YOU LOVE THEM.

DON'T LET BOYFRIEND/GIRLFRIEND KNOW THAT YOU HAVE A BOYFRIEND/GIRLFRIEND.

DON'T VISIT GAY CHAT SITES WHEN YOU THINK NEITHER OF THEM KNOW.

SORT YOURSELF OUT AND COMMIT TO ONE OR THE OTHER.

BETTER YET, BE TRUE TO YOURSELF.

YOU SHHLAAAAAAGS.