Help!Want to be a chef but can't taste food!

I really want to be a chef but each time when I see 'normal' food etc I won't even dare to touch them because I am afraid that I might 'touch' their calories, let along tasting them. Also if I just had 'a bite' then I will feel sad,anxious and helpless for the rest of the week. To me normal foods are like snakes or other scary things and being fat is like doing low class things...How do I just have a healthy relationship with food without going fat???? How do I just stop this thought and dare to taste like normal ppl do???Help!