about to have panic attack

I've suffered from anxiety since I was a small child (I remember creating obsessions like a terror of the weedkiller in the garden when I discovered it was dangerous). In this past few years, I've had an onset of anxiety much more severe that that of my younger days... I chalk it up to a really awful experience I had four years ago in switching highschools.

Anyway- I've had two panic attacks- I'm sure they were panic attacks- in the past two years. One was in October, another in June. Both began with an obsessive worry and the attack occured at a peak. In between the peak in October and probably April or May, I hadn't worried at all. I'm a generally happy person, but it seems to be my nature to worry obsessively!

Anyway- since my last attack, which consisted of an inability to breathe properly, I've not been completely without worry. I'm in a very happy relationship, and my boyfriend knows that I worry and is always supportive, though I'm not sure he's aware of the extent to which I get upset. It seems that when I'm without my family or close friends, the anxiety begins to onset. I'll feel detached, dazed or out of reality. It's not the stuff of attacks, but it's still upsetting...

I don't want to see anybody about it, because I know I can make it go away, but HOW?