Why Is It?

So, for the past couple of years I've really struggled with a lack of friendships in my life. I can count on one hand the amount of steady friends I've had in that time. I don't even need my whole hand, actually. It seems like when I hit rock bottom frustration with it, God brings a wave of great friends into my life. Then they go... just like they came. Since I've been married, I've struggled with wanting couples to be close friends with. It's been so hard and all of the sudden a couple of months ago, we were not only blessed with about 5 couples our age that promised friendship but I was also blessed with girls from work that I very quickly became close to. My job switch was the best decision I've ever made!
Now, all my friends are quitting the job (no joke- ALL of them) and will be gone after next week. The only glimmer of hope with Tony's job schedule change in Sept is that we might get 4 nights together (except for nights at school) instead of 1 that we get now. If we get that, he will work on our Bible study night. WHY am I blessed with friends to have them taken away a short time later?!?!?! They lose interest in me or move on to a different season in life. I know I can continue to be friends with the girls at work but it won't be the same, not at all. I can go to Bible study alone, but it's hard for me to relate to couples by myself- I feel like I'm a wife and can't really represent myself without him. That may be pathetic, but it's me.

All that to say.... I'm about to be lonely again and don't understand why!