As a teenager I was diagnosed with "social phobia" (among many other things...) and from all the drugs indicated for it, excluding benzodiazepines, only paroxetine really speeded me up socially and dug me out of depression I suffered from too. My then doctor, having heard from me at some point that I'd been feeling worse and worse from paroxetine, decided to add buspirone, so it easies anxiety and adds up to paroxetine effects on serotonin. It ended dramatically, I was actually hypomanic all the time and eventually I did a stupid thing to a girl who liked me and who I liked. :/ I got off paroxetine with some withdrawal and promised myself never to use antidepressants again. Once I was clean from paroxetine, I realized how it was changing me as if I was a different person.
The only drugs that really made me more social generally or rather kept me up to some extent from turning completely depressed were unfortunately benzodiazepines. I started using temazepam at first sporadically to calm down when I was 13. Contrary to how people perceive temazepam, it felt weak for me. I moved on to lorazepam and estazolam and these two actually got me hooked on. Lorazepam released me not only from anxiety, but also it boosted up my mood, and estazolam was ideal for chilling out. Also, similarly to estazolam, alprazolam is good to quickly chill you out and it's much less sleepy. But the best option for anxiety I've come across is bromazepam - it kicks in fairly quick, definitely quicker than lorazepam does, and it seemed to me completely devoid of drowsiness, however, I was quite tolerant to benzodiazepines at that time already. Diazepam and clonazepam are probably two most overrated benzodiazepines; for diazepam it's probably because it's the most widespread, and for clonazepam it's probably because of its potency, but neither really has "the feeling". Eventually I ended up on clonazepam, I was young and had a doctor who I could easily manipulate and manipulated her into switching me from lorazepam to clonazepam. Now as I'm thinking of it, I can't imagine a psychiatrist who would switch a patient from anything to clonazepam. There are a few long-lasting BZDs much less potent I could be partially switched to (diazepam, clorazepate, chlordiazepoxide) and then get off. If I had got to my present doctor back then, I guess I'd have been off this shit by now.
Benzodiazepines are miracle drugs for anxiety, but they must be used wisely, otherwise you're into the worst physical dependence possible as you're messing with one of the most "basic" neurotransmitters and when you mess it up (GABA/glutamate), there's really nothing you can do, but slowly try to bring back the right balance with GABAergics.
PS. After all these years I came to a conclusion I never really qualified to be diagnosed with social phobia or anything else. All I suffered from was plain depression and there were reasons for it which probably could be overcome with proper psychotherapy. But it's so hard to find a good therapist if you're generally resistant. A few specialists even tried to hypnotise me and it never worked, I simply can't trust anyone.