Ok that's me my little penguin or aka mr chicken
Latest studies have shown the increase risk of bad things like lymphoma etc come from drugs like imuran and [wiki2="6-Mercaptopurine"]6-mp[/wiki2] .
Biologics have shown that they don't have these risks
The important thing to realize is the risk of anything bad is really low.
We do things everyday that have much higher risks
Riding in car is the highest risk for any child and especially young adults but we do it everyday since it improves are life even more.
Swimming another high risk activity for kids and young adults but again for most with the proper supervision not an issue .
Risk vs benefits .
The doctor makes recommendations for a med when the benefits outweigh the small risk .
My kiddo is 11. He was dx at age 7.
He has not had any surgery .
He has been on 6-mp but that wasn't enough.
He also tried remicade at age 8.
That worked really well for him .
He is now on humira and mtx .
I can say he went through 2nd through the beginning of6th grade now on these meds without getting sicker ( actually less sick ) than my other kiddo.
He swims competively goes to school etc...
No issues
He does drink supplemental nutrition ( peptamen jr ) in addition to food to help make sure he grows and gains like his classmates .
This has worked well and he is on the taller side and not skinny .
Diet alone is not enough to control [wiki2="Crohns-Disease"]crohns[/wiki2] in kids ...adults sometimes but not kids.
We just add it to meds to make sure growth is not affected 
I would ask your Gi with your parents what the risks are with remicade but more importantly what the benefits are.
Also what the docs sees happening if you change nothing and leave things as they are .
Good luck
