You did some good things. You have a good left hook, your have a good jab and you double it well, you have good feet, you move your head and your shell is pretty solid.
1 The biggest thing I see is that you have a tendency to keep your shoulders too open towards your opponent. That makes you easier to hit and give you nothing to turn with when you throw the right hand (you are already 50% around). Close your upper body more towards your opponent and pull the left should back when you fire the right hand. With your kind of body you need torque to generate power. The open shoulder probably helps you turn on the lead hook but that's not the greatest punch anyway.
2.Don't back straight up, you have to pivot out of trouble.
3. When he punches; move or punch, don't wait, you're taking too long to return fire and if you run in to a big puncher that's a problem. Catch and counter or move, don't take 4 or 5 punch combos in a shell, a seasoned fighter will find holes.
4. He was shorter than you, throw more upper cuts from the inside and you could have dictated the range better.
5. I know you guys were monitoring your pace but don't flick the right hand and don't loop it.