some tips for various points that i messed up in please?

could someone please suggest some better moves at various points in this game?

Some points where you lost material in a very simple way:

3...e5: this pawn is protected once and attacked twice

14...Bh4+: this bishop is unprotected, but attacked by the queen on a4

24...Bd8: leaves your rook on a8 unprotected while it is attacked

27...Qd8: leaves your knight on h5 unprotected while it is attacked

42...Rxe3+: this rook is attacked twice and protected only once

45...g5: he could have taken this pawn for free with 46.hxg6 en passant

Also 31...Qxa3 lost the knight to the double attack 32.Qd5+, but that's the next level of chess skill - just protecting your pieces to normal attacks comes first.

Since he makes a similar amount of mistakes like that, you were in the game for pretty long, but you could have trounced him.

Stop losing material in the simplest way possible (and continue to take his pieces for free when you get the chance), it's the first thing to learn in chess.

i do agree that those were all stupid moves and that i should pay mroe attention, but 42...Rxe3+ was completely intentional, I wanted him to lose his queen because it had been annoying me for a while, and before i made that move i thought that i would easily be able to take all of his pawns and get a queen or 2. i was obviously wrong though

On move 45 was a complete blunder!

You should have won. Move Rx e5 was an great/ o.k. move bt you should not have pushed your g pawn until all of your oppenent's pawns were gone!