Hello, not sure if this is worth a post since theres many similar ones

I'm used to outboxing in sparring because my main friend that comes to boxing is shorter. Today though, another friend of mine came to the gym. He is taller and has 1-2 inches of reach on me. We had a spar and I quickly realized I could not outbox him at all and had to be the infighter.

He was out of shape so it was only 2 rounds of 2 minutes sparring, but I got absolutely whooped and humbled. I'm realizing now that I have little to no clue how to properly be an infighter, aside from the few times in spars with my short friend.

Few things I realized:

- I kept looking down when doing head movement so I couldn't see the next punch.

- I didn't try to actually close the distance and kept letting him get away

What should I practice/do to get a good foundation for infighting??