I do the exact same thing , I have a big problem with avoidance and anxiety where I avoid things but avoiding them makes them much worse than they needed to be and causes even more anxiety lol. The only way to deal with that is to do the things as quickly as possible unfortunately, without even thinking about it so that you don't give yourself the chance to put it off. Just don't think about it too much and reply as soon as you see the text (even if it might be "too soon" for some people, those are just stupid social "rules", better too soon than not answering or ghosting). Also most people (at least most mature people) know that text conversations aren't the same as real life conversations, you don't have to respond the perfect thing all the time. Just take the pressure off, answer as quickly as you can and don't think too much about it