I am very moved to see this problem. I am introverted and like to travel. Let me tell you how I made friends! The first is to take pictures. When you go out alone, you can often ask other tourists to take photos and chat for you! Again, it's easy to make friends by playing games with everyone in the youth travel and public areas! There is also doing more homework and learning more about local tourism, which is also a topic of conversation with others. I hope I can help you!