H!! So my question is why is it when I'm home belting and everything and then after I'm done I feel fine like my voice isn't tired or anything yet When I sing in front of others my voice gets tired like way faster?? any Tips??

It's possible that when you're at home, you're relaxed and not pushing or straining - but when you get in front of others, you might be a little tense and "push" for volume. If that's the case, it's a matter of noticing that "push" or strain happening, relaxing the muscles that might be "grabbing", and trusting your at-home technique.