being alone is tough.

I agree with Sept about attracting certain ppl, but I also think that it's because we KNOW how to respond to them (not only/necessarily that we think it's what is right.) ...Maybe not even know how to respond, but because it isn't such an unknown behavior? The unknown can be fearful.

Not all your fault. I'm sorry you are so depressed. Take a few more minutes to think about it, then put it aside, get up and move on! You are wiser now, and will make better choices!