Am i a sex addict?

Tay

so I've been with the LOML for 5 years she was my first and she is amazing in bed but we have grown apart over the last few years but we are trying to find our way back to each other...the sex is amazing (when we do have sex) but I just feel so unfulfilled and always wanting more! I've thought about going somewhere else to full fill my needs but I know ill be unsatisfied and feel very guitly! but I'm always so very horny and pleasing myself just doesn't do it anymore. am I a sex addict? and would I be wrong if I went somewhere else? what do I do?