Can it be successful to express your confession to each other by sending text messages?

There are many ways to express feelings, and SMS is one of them. However, it is best not to use this method.

Have confidence in yourself, it will be better to say it in person, and let people feel your sincerity. Don't be afraid of embarrassment after failure.

If you are really shy and can't say it in person, please call and say, words speak louder than words. Even if you are still nervous on the phone, I think the other person can feel that you are serious.