Dear Tom:
I have received your letter, I know you are very lonely at home now, but the reason is that you seldom make friends. Every day, besides surfing the Internet, you watch TV at home. I have some skills of making friends. Don‘t worry, you will have many friends soon.
First of all, you should change yourself to make your introverted character more extroverted, so that you will be liked by many people. Second, you need to go out more, so that you can realize all kinds of friends. Third, making friends is not about more, but about being able to treat you sincerely.
I hope these methods can help you. In a word, I believe you can make a lot of friends so that you won’t feel lonely.