7: At first glance, it does not look like a very good move by black. You invaded a loose framework, and he played passively. A pincer looks better, working with the lower left shimari.
8-11: Seems like aji keshi for you. It forces him to take corner territory.
You don't really have to answer 7. Your stone is light, and the board is big.
14-29: Nice kill

30: Why let him wall you in? Play G3. You either kill G2 or you connect at H3. Then his J3/J4 stones look worthless.
37: Joseki here is C11 by him. If he doesn't take it...
38:...you should. ( Actually C12 may be even better for you - not sure... )
48/50: It's tewari analysis time. Look at the board at move 50.
What does C11 do for you? Ans: absolutely nothing. You would much prefer to play it someplace else like E10 or Q14 or...
So play C10 at move 48. He has to patch. Then you have the same situation at move 50, except you have not played at C11 and you can play that stone someplace else.
56: This seems a bit loose.