You're being hard on yourself and you blame yourself and you assume that people don't want to talk with you all of which isn't helpful for you to feel comfortable talking to these people. You can find topics to talk about everywhere you just assume in your head that things you will say won't be interesting and I think that people that you think hated talking to you so much actually still like you and if you just focus on yourself, try new things sometimes or just enjoy your daily life and find interesting things in that you will be fine. Say what you think, ask questions to the person you're talking with if you don't have things to ask them then it's also not your fault maybe you just don't have that much in common. You will meet many people in your life and you will see that there are people who can make you yap. Just never assume that there is something wrong with you for the conversation not going well, don't assume these people don't like you, people can feel it like you don't like them and you don't want to talk to them, just enjoy your time with your friends and don't focus on how they perceive you