My bf has been congested for the past few days, now he'sdizzy&running a fever. He's been talking abouthisside, near his appendix hurting should I worry?

Yes. But he should worry more. If he is having these symptoms he may well need an evaluation for appendicitis, hopefully before it ruptures, and you should urge him to seek medical evaluation. Hope this turns out to be nothing serious.
Yes. Wait no longer; this is definitely smoke. Let's take care of what could be a deadly fire.
See your doctor! If your boyfriend is having fever and right lower abdominal pain, he needs to see his doctor or go to the er for evaluation asap.