I think it's a 

>! **[Dragon fruit][1]** (*Pitaya*)These fruits are commonly known in English as "dragon fruit"

Cut me for nothing to be missed,

>! You have to cut this fruit for you to eat the creamy and delicious inside

open me to be surprised.

>! If you open this fruit, you'll be surprised of its bright white flesh that looks similar to a kiwi inside, with tiny black seeds distributed throughout the fruit.

Be my fruit and you'll be loved,

>! This fruit is exotic and many people want to have this fruit because of the extreme health benefits that it gives 

Though if I'm from an animal you'll be doomed.

>! If it becomes a real dragon, you'll be really doomed! 


  [1]: http://en.wikipedia.org/wiki/Pitaya