How can I maintain my weight as a vegan?

Well I have been a vegetarian for 3 months after watching a poor rat get killed and crushed to death by someone before my eyes and I decided that I want to be a vegan after watching the EARTHLINGS on how they kill animals in the slaughter house but since I have given up meat and all diary products how can maintain my weight. I am 15, 5'2 and 110 pounds and I like my weight the way it is and I don't want to get thinner. What kinds of food and vegetables will give me the energy and fat to survive.



I literally cried watching this video
How can I maintain my weight as a vegan?
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