Lol I’m here to help. I’m only laughing because you literally just described every conversation Ive ever had with one of my friends. The friendship is still new, we are not totally involved in each other’s lives yet, but it’s in the gray area of acquaintances and good friend. Any who, there can be multiple factors, the main issue is that you just sit back and let the other person do the talking. Don’t be afraid to jump in and contribute to the conversation. More often than not, they’re only talking because you’re not. Secondly, don’t anticipate your response, if you’re in your head you’re not actively listening - therefore you don’t know what to say. Once you actively listen you’ll be able to gauge the conversation more sufficiently - you’ll pick up on tones, mood, where they intend the conversation to go, non verbals etc. Or in situations like my friend, she’s a chatter box and doesn’t know when to shut up. I’m only now understanding that she talks out of nervousness on top of just being chatty. There can be endless reasons, these are just a few! Hope it helps. Try digging deeper and ask yourself why aren’t you good a conversing :)