<human>: So, I've never been much of a chatter, and I used to have pretty bad social anxiety, but I decided that I wanted to be more talkative and able to carry on a good conversation. I'm done being the guy who doesn't say anything. I've overcome a lot of my social anxiety and no longer feel that gut-wrenching "I need to get out of here" feeling in social situations, but I still have problems thinking of things to say. My mind goes blank, and nothing to say comes to me, so I simply nod and say "Yup. Uh-huh." I try to be interested in and curious about the other person so I can ask follow-up questions or say something that relates to them, but I never feel like I have anything to add.

Curiously, this isn't a problem when I'm IMing or texting someone. Things to say just come to me; carrying on a good conversation isn't a struggle and comes rather naturally.

I'm really having trouble pin-pointing what my problem is here despite my best efforts. Has anyone else had this problem, and does anyone have some an explanation or some tips to overcome it?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I can communicate well through text communication but when I have to speak verbally, I can't think of anything to say. Why? Help!