I couldn't agree more with 'You know when it's time.'
I truly understand, like everyone on here does, of what you're going through. I found it exceedingly difficult during college to simply get on two buses to get to school, then to spend 12 hours at an institution when you're feeling horrible.
You always have options, and if you think you want to get rid of this disease then go for the surgery. I can't convince you to do so. This is your rant. No one here can convince you otherwise.
LDN, Imuran, SCD, worms, 5ASA's are options you can try. But when it gets to the point where you're considering surgery then perhaps you know it's the right time.
You're not giving up, you're taking your life back. I'll do the same thing when it's my time.
Hope everything goes well for you.