Is it necessary to text your boyfriend every morning?

It's not necessary. Just because you send it every day, he feels used to it and it's not new. If you don't send it, he will still be suspicious. It's not surprising. If you don't send greetings often, he will look forward to it, be happy and care.

For example, if he sends you a rose every day, you will envy sending your girlfriend a bunch of flowers on Valentine's Day. If he doesn't usually send flowers, are you happy and satisfied to send you one on Valentine's Day?