A couple of quick bits of advice: I don't think your g4 push was a good idea. At that point in the game, it was clear white was in complete control (your knight on e5 was a god, and black's bishop is horrendous). Therefore I am not sure why you went for the kingside attack so early. In my opinion, simply castling on the Kingside and then playing the c4 break, activating your rooks and plundering his queenside, was all that was sufficient to give black a completely miserable game. I think that by pushing g4, you gave black too much play against your central king, when his game beforehand (due to your death grip on the dark squares) was quite horrible. Regardless, nice play by black to somehow get out of that game without a loss (after his horrid opening).
My game against a 1730, please help
Very strong play by white, I think the exchange sacrifice is correct and is very strong. On move 34 you should have played 34. Rc7 Qxc7 35. Bxc7 Kxc7 with a clearly better ending for white in my opinion. 34...Kd8 35. Qh7 is to dangerous for black.
Nice game.
Nice game !! Congrats !! Beautiful exchange sacrifice 
strong play by you :)
not sure about this 12.g4 move ... maybe it was too early. i think black should have answered with 12.g4 Ne4 shutting down your light square bishop . followed by b5 - b4 with a counterattack on your queen side. not sure about that ... you had some very nice play and it's a shame you didn't win but i think black still had some strong counterplay , ill check it with a chess engine. intresting :)
You did well against a person rated 1730. I do not think the game was very drawish, and I think you would have done better if you had castled early, but still a great game!
9...Bxe5 looks reasonable at first: exchange bishop for knight in a closed position. However, this bishop guards the dark squares, without it those squares are permanently weak. 9...0-0 or 9...Ne4 look better to me.
10...Qa5+ doesn't really do anything
After 16...Nxd5? he's finished, your bishop is way too powerful controlling those weak squares.
18.h5 wins immediately, Kd2 has some logic behind it but it's too slow. 18...f4 19.Bxf4,cxd4 20.Qb3,dxe3+ 21.fxe3,d4 and black has some great attacking chances exploiting your king and bishop's position.
18.h5,Nxh5 19.Bxh5,gxh5 20.Qxh5,Rf7 21.g6 and black is finished.
22...Qd8 moves back and enables you to exploit his weak dark squares even further with 23.Qb3,Qb6 24.Qa3,Rfe8 25.Rah1,Qd8 26.Bxg7,Kxg7 27.Bxh5,Bxh5 28.Rxh5,Rh8 29.Rh6 and you have a great attack.
24.Qc2 is fine too.
You missed 35.Rc7+,Kb8 26.Rc5+
You are winning in the final position for the following reasons:
1.You have an excellent bishop controlling his weak dark squares, and it controls your passed pawn's promotion square and is a stable advantage taking squares away from his pieces.
2.His rooks are very passive as you control the only open files. Everything else is solid and they have no way through. Rooks bite on granite harder than bishops since bishops can slink through holes in pawn structures.
Play could continue 36.Kb1,Qc4 37.a4,Qxa4?? 38.Rc7+ with the same idea as before or 37...Qd3+ 38.Kc1,Qf1+ 39.Kc2,Qc4 40.b3 and his queen checks ran out. 40...Qc6 it's tempting to play Rc7+ winning queen for rook and bishop, but your rook and bishop are more active than his queen. The line still wins but requires more technique than 41.a5,Rgf8 42.g6,b5 43.axb6,Qxb6 44.g7
There was nothing essentially wrong with Black's d5/f5 stonewall formation. Granted, his dark squares are weak and his Q-Bishop bad, but almost any formation can withstand a single weakness (it usually requires alternating play against two seperate weaknesses, to win) and as compensation Black gains great solidity in the center, especially on the light squares.
I'm not sure why you were so determined to prevent the exchange of your Q-Bishop for an enemy Knight. With most of your Pawns positioned on dark squares, your dark-squared Bishop was not a very useful piece (even when positioned in front of your Pawns, rather than trapped behind them), while in a closed position, Knights are quite valuable.
You could have simply left your dark-squared Bishop at f4, guarded it with Pawn-to-e3, and if he played N(f6)-h5xf4 to trade off your Bishop, just recapture with the e-Pawn, giving you even more control over the e5 square and an open e-file for your Rooks to pressure the weak Pawn on e6.
I agree that there was no real hurry to play g2-g4... Black was too cramped to take any really effective preventative measures. You could have finished developing your pieces before opening that flank.
Thank you so much for all your replies guys! It really opened up my eyes in some areas. To be honest I didn't even see the check I had at the end and just assumed I would be perpetually checked myself forever :)
Your 13:... G5 was premature, I believe Rg1 threatening pxp followed by Bxp was better, you could continue with f3 and then pushing the h pawn to h5 to force the opening of the King side, followed by a properly timed 0-0-0
I was excited to play against a 1730 (much higher than me!) and tried my best. At one point I felt like there had to be a win somewhere, but ultimately I got to a drawn or possibly lost position and we agreed to draw. This led to believe that there might be things going on that I simply didn't see, and that I could use some advice.
Please read especially my comment on move 24. Perhaps I could get some comments on my game overall?