I have developed alcohol intolerance, I vomit a lot after 500ml beer, spirits areintolerable. I'm 19, hadstomach ulcers, will I ever be able to drink?

ETOH. Please have your blood tested to determine if your liver is unstable. This is not usual for someone so young. Some people, often asian, have an alcohol intolerance that is genetic, but certainly if this is new onset you must seek help immediately.