If you are texting each other like two people in a relationship (couple) do, when you are obviously not a couple, it is too much in the sense that there is a very high chance that things will stall because there is no more room for momentum, and no build up to couple-hood.
Human being need “connection” like we need food. Some days you eat more, some days less. Some days you eat this and other days you eat that. And just like food, you are the only one that can regulate how much is too much in one single day.
If you can’t regulate yourself, that’s a sign that you need to work on being able to tell when you are overdoing something or underdoing it.