Ecclesiastes 4:9 Two are better than one, because they have a good reward for their toil. 10 For if they fall, one will lift up the other; but woe to one who is alone and falls and does not have another to help. 11 Again, if two lie together, they keep warm; but how can one keep warm alone? 12 And though one might prevail against another, two will withstand one. 

Much of the book of Ecclesiastes if pretty depressing, but this passage is an exception. I like my alone time as much as anyone, but am so grateful for the people who journey through life with me. They are a blessing from the Lord.