You assumed that because you lost the hand you did something wrong.

Sure, the turn bet should have been a shove, but since you didn't notice it, what makes you think you did something wrong?

Also, punctuation and spelling (at least in the title!) make your posts easier to read.

ive read that if ur going to bet, and its going to be half or more of ur stack it should be all in.. not sure if that applies to deep stacks.. maybe someone else has some thoughts on that?
Suppose you're heads up a $1 pot and you have $2 left.
If you make a pot sized bet of $1 and get called, there's $3 in the pot. If someone later tries to put you all in for $1 more, you'll be getting 4:1 pot odds and have to call in most situations. (You're pot committed)

Compare this to just betting all-in to start with. If you go all-in you're putting the same amount of money at risk, but you don't give your opponent the option of seeing another card before risking their money.

The threshold of pot-commitment varies (half your stack is a rule of thumb) and there might be rare times to break the rule, but the principle applies at all stack sizes.