Summarize:

Pick a really close friend or relative and talk to them about your problem. You’ll find that people who care about you will go out of their way to make you feel better, feel supported, and feel more connected. After all, having a solid support system is one of the most important things in feeling connected to the people around you.  Your friend or relative will know how you feel and might be more understanding if you’re in a situation where you feel lonely. They might offer advice or perspective on how you feel. They’ll try to make you feel loved and supported. One reason you might be lonely in a crowd is that you’re surrounded by people who are extroverts, much more social than you, or even share drastically different worldviews or interests. A good way to overcome this is to find others like yourself with whom you can relate and socialize. Try to:  Talk to many different people briefly in order to find people more like yourself. Master the art of the quick interview. Try asking people about where they grew up, where they live, where they went to school, or what they do for a living. These are easy ways of finding people you share something in common with. Don’t trap yourself in the idea that no one is like you. Sometimes our loneliness is compounded by the fact that we feel too stressed and too drained talking and entertaining others. Instead, try to listen to others. Many people who are extroverts and like to socialize also like to talk about themselves. View this as an opportunity. They’ll enjoy you listening to them, and you’ll create your own niche as someone who listens to others. Practice conversing with different people and getting yourself used to socializing. This way, when you’re in a crowd, you’ll be more at ease when it comes to talking to people and forming connections.  Talk to people about things you have in common, like where you grew up, schools you went to, or friends you share in common. Talk to people about current events like the weather, sports, or things happening in your community. Avoid steering a conversation toward your own interests at the expense of others. You might be lonely in a crowd because you’re not used to socializing in large groups. One way to overcome this is to make yourself socialize. Practice makes perfect. The more you socialize, the easier it’ll be, and the more comfortable you’ll be talking to other people and making friends.  Focus on deep conversations, rather than chit-chat and superficial discussion. If appropriate, ask people what they think about something you are interested in. Socialize with people you know and care about. Start in environments you feel comfortable in.
Open up to close friends or relatives. Find others like you. Listen to others. Master the art of conversation. Force yourself to socialize.