Alone vs with friends

If asked if one prefers to spend his time alone or with other people, in reality, for most of people it is impossible to give an answer as black or white. However, I would say that recently I put more preference to spending my time alone than to spend with friends for the following reasons.  

First, these days I am more interested in improving myself as professional than sharing funs with my friends, and so I like spending my free time reading and studying alone. I would like to take advantage of being single because I know that after the marriage, especially after giving a birth to a baby, it is very difficult for a woman to find time to study for her own.  

Secondly, now I do not have many friends with whom I can go out in my free time. When I was younger, I used to like going out with my friends and also I had more friends to study together. But now most of my friends are busy with their family matters or work and so they are also not interested in having funs with friends nor have time to study together. Now my communication with them is mostly by emails and telephone, instead of sharing our free time together.  

Thirdly, I have very good relationship established with my coworkers at work, which certainly satisfies my emotional necessity of sharing things and feelings with somebody. We eat lunch together every day, joking and talking about our personal issues. Therefore I do not feel lonely even when I do not have any invitation and spend the weekend at home alone.  

In conclusion, thus, my preference about how I spend my free time has changed very much since when I was younger and for me now the time I spend alone is more important to improve my ability.