does anyone know how to overcome loneliness?

I assume that since you've asked the question, you both feel lonely and don't have people available to visit at the moment.

Overcoming an emotion without resorting to a materialistic solution is tricky, but possible. The materialistic solution that immediately comes to mind is to try to be around people, but if this is impractical, then attempting it just adds frustration to the loneliness, making you feel worse.

If you pay attention to your mind closely, you will notice that your thoughts about being alone make your lonely feeling stronger and that the stronger the feeling becomes, the more you think about being lonely, which in turn makes it worse; it goes on and on in an endless downward spiral until something interrupts it.

Your mind rambles on endlessly commenting on everything, but just because the thought is in your head doesn't make it your thought. Trying to distract yourself or ignore your thoughts doesn't work because the emotion continues to feed the thoughts and vice-versa while you are trying to get your mind off of the loneliness, and so even if you try to focus on something else, your attention is just brought right back to the unpleasant feeling.

The trick is to face your feelings and disidentify with the thoughts that are feeding the loneliness. Instead of trying to distract yourself from the loneliness, try to focus on the feeling directly and not the thoughts that feed or arise from it. This way, you are both facing the emotion and not focusing on the thoughts that are feeding it, which makes both the feeling and thoughts weaker. It does this in two ways: One, it helps you realize that the rambling voice in your head is not your own, and two, it helps you realize that the emotion is just an illusion to begin with. When you face it, you realize that its not all that bad; it's just another sensation, like the feel of something brushing against your arm. What seemed to be unbearable now seems more like a trick of the light.

In this way you can transcend your loneliness. You may still feel it, but it won't upset you as much. You can be at peace with it. And if you can be at peace with it, I would say that you've overcome it.

Hang out with friends?

Yes.