What time do I usually eat dinner? Who do I usually eat with?

I usually eat my dinner between 5 and 7 o'clock.

It would be better to say "I usually have my dinner between 5-7 pm."

And I usually eat by myself, or sometimes with my host father.

But these habits are really different than the ones I grew up with.

I grew up in France, where we usually eat dinner later than in the United-States, between 7 and 9.

Again, it is better to write pm and you can also say "have my dinner". So it would be "I grew up in France, where we usually have our dinner later than in the United-States, between 7 and 9 pm." What you wrote is absolutely right, but I just wanted to give you another option.

We also eat dinner together as a family, almost everyday.

What time do I usually eat dinner? Who do I usually eat with?

And I usually eat by myself, or sometimes with my host father.

You wouldn't normally say host father, but rather "the father of my host family"

But these habits are really different thanfrom the ones I grew up with.

I grew up in France, where we usually eat dinner later than in the United- States, between 7 and 9.

We also eat dinner together as a family almost every day.

Be careful here: everyday is an adjective "I was surprised to see everyone dressed so nicely at the party, when I was just wearing my everyday clothes".
Here, you meant "every day" which means tous les jours.

But these habits are really different thanfrom the ones I grew up with.

I grew up in France, where we usually eat dinner later than in the United- States, between 7 and 9.

We also eat dinner together as a family almost every day.

"Everyday" is an adjective (e.g., "everyday life"), while "every day" refers to each day.