Looking for feedback on my games from strong players!

I'm a recently made OTB B-class tournament player and just haven't found many A/expert/Master friends so far!  Here is a loss I had a few months ago, for which I'm not sure I'd play much better now.

No matter your rating, feel free to leave feedback, or questions about what I was thinking during a particular move, etc.  Thanks for reading!

Many thanks for your comments in advance!

I'd still rather play black on that side, and often do, although 6...cxd4 seems to relieve tension too early, no?

@Paul, thanks for the comments!  I appreciate your positive outlook on my ability.  20. Nc5, which I considered at the time amazingly enough, looks ridiculuously more strong at this point.  What is my N doing on b3 beside defense, and that's not changing unless I change.  I had the initiative and need to use it properly.  I do and have done a lot of puzzles, and I think they led me to want to look for a combination when there was not one there.

Regarding to your comment on move 8 about gambitting the d-pawn I doubt if it's viable alternative in this position. There is a well known variation in French Tarrasch where white gambits this pawn: 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ngf3!? Qb6 (7... g6) 8. 0-0! cxd4 9. cxd4 Nxd4 10. Nxd4 Qxd4 11. Nf3. However in your game f4 has been played and this will make it very hard for white to castle if he sacs d4.

After f4 white usually tries to hold the centre by taking his other knight to f3 with 6. c3 Nc6 7. Ndf3. However, I must warn you that in these variations white usually doesn't seem to castle (maybe he has no time) and black often sacrifices a piece to blow the centre open.