Allergic to all fruit? Weird!
You say you eat very little, have you kept an accurate and detailed food journal on something like Fitday to really see what you're eating? Two possibilities:
1. A lot of people under estimate or don't have a good understanding of portion sizes. Lots of little things can add up.
2. You truly are eating too little which can also be detrimental for weight loss (sounds counter intuitive, I know). Figuring out I had to convince my body it wasn't starving so I could lose weight successfully was a huge paradigm shift for me with dramatically successful results. I went from 20 years of yo yo dieting and failure to successful weight loss and maintenance.
Keep a food journal for 2 weeks. Record what you eat, when you eat and why you eat (hungry, bored, sad, stressed). Find a decent calorie calculator online to get an estimate of how many calories a person of your height/weight/gender/age/activity level needs to maintain and then make small adjustments. For example, if you need 2200 calories to maintain, try to eat 1700 calories a day. That would be a 500 calorie a day deficit. Do that for 7 days and that's a deficit of 3500 calories - enough to lose 1 lb.
http://www.mayoclinic.com/health/cal...ulator/NU00598 (this is just an estimate)
I'm a busy person too. I just had to make time to grocery shop, pack lunches and exercise. The time commitment is worth it.