Mei ~
I'm sorry you are feeling sad now. How long will your BF be away from home?
When my husband is away, I spent time with my girlfriends. We go to see movies that our husbands don't want to see. We have a good time and enjoy our time together.
I think going out for some fresh air is a good. Walk around and get some exercise and it will help your mood.
Have a very nice day.