Creating some Combination and lose :)
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what was my mistake?
This almost looks like spam, but clearly it is actually advertising chess.com, since this chess player needed to come here for help. This site also has game analysis for paying members, but I'm glad you posted the game here. The the way black pacified your knight and trapped your bishop was very educational. I'm looking over that to see how it was planned.
I think Qxd2 was a mistake. The power of the queen's gambit comes from White being able to take back that pawn. The queen needs access to the a8-h1 diagonal at f3. I would have played Nxd2. Also it is nice for the queen to be guarding the a1 rook so that axb5 can be played.
White, instead of playing e4 right away, should play axb5, then Bf3 if cxb5.
White normally wins the queen's gambit accepted by more than a 2:1 ratio. If you are losing as white, you are doing something wrong.
13. Bxb8 14. Nf6 or Rd1
13. Be5 is interesting, but there still is a chace of getting trapped later.
15. g6, or mabye exf5 then g6. Your castle will be opened and your rook will move to g1
17. Nf3?! blocks your bishop and has no squares for the knight to go. Better is Ne4, eyeing a perch on d6 and f6. At least your knight can't be attacked on f3.
21. Rbc1?! 21. Rba1, 22. Ra4
25. Rc6 looked nice, but failed. My first thought was to focus on the dangerous passed pawn with 25. Rfd1 d2 26. Rc moves 27. Nf3 double attacks pawn.
I stand corrected. 25 Rc6 got you two black pawns. 32. Rg4 might pick up another pawn. The Bishop is easily defended with a rook.
33. Why didn't Black's king take your e pawn?
Why didn't black's knight take the d pawn?
37. Your combo loses to ... Kxd6 38. Nxe8+ Rxe8 39. Kf1 well, it does not lose, but you are a knight down and maybe headed for a draw.
41. Kf1