You may not love him as much as you believe.
If you were suffering from anxiety/panic attacks before you met him you may have clung on to him as if he was a life raft, but if this condition developed during the time you've known him it most probably indicates that you'll be better off without him.
In any event, it sounds as if you may have been coming from a place of emotional neediness in which case you would benefit from working on your self-esteem before emarking on the romantic merry-go-round again. When you were prescribed 'anti-wobble' pills, did your GP suggest you consider counselling or CBT?
Don't be your own worst enemy; you've no doubt loved and lost before and you can get through it again. Deep breaths and keep putting one foot in front of the other which, loosely translated, means concentrating on the good things you have in the present moment rather than revisiting the past or trying to second guess the future.
Presumably you didn't introduce him to your dds within days of meeting him and, as they will have only known him for a couple of months, no doubt he'll soon be distant memory for them - unless, of course, you harp on about him.