Lonley time in my life, starting to be really scared..

Hello Everybody.

I live in the south of France ,and for the first time in my life I'm living alone in an appartement. First, everything was doing pretty good, getting used of being independant from my parents and enjoying it. But recently it's been harder...
I had a history of mental depression in my teens, I was having the worst terrible anxiety attacks : I couldn't go to school anymore, eat like nothing, had very few friends...basically I stop living for a while. It was hell. I finally saw a shrink who gave me antipressants and within a year I became myself again, graduated and went to college.
5 years later I'm a adult who goes to work and live by herself.. and the fact is I have the feeling that I'm coming back to my old bad habits : anxiety attacks at work, at the appartement. I have the terrible feeling that slowly but surely I'm falling back into depression. I though having my own place would be good for me, but I feel so ALONE!!it's scares me so bad. Recently most of my friends move out of town, I miss my ex boyfriend so badly .I try to stay positive but It feels like nothing goes wright .At the same time I feel that I can't go through another depression like I did before it's so -hard-
I don't really know what to do, I'm seeing another shrink but I don't feel any better.
Thank you a lot for reading this.