A vacation can mean spending the weekend at a friend's house and going to the park. I think the point is 'break in routine'. You don't need to have a lot of money to do that, and I think if you explained to any good friend the need to just 'get away for a few days' they would be more than willing to help. Camping is pretty cheap, too, and it's still summer. Heck, just watching DVDs, eating some Pizza/Chinese on the couch with a few pals, and recreating that age old 'slumber party' can be just what the doctor ordered.
I'd echo what MonkWren said earlier about the counseling; one has to really commit to it for success. My wife had a very hard life growing up in the third world and experienced a lot difficult things in life. She did need some counseling when she came stateside, but she worked at it like a trooper and now she's an ABD Economist. It doesn't mean all problems immediately vanish, but it means she knows how to react and deal with them, and thus lives a pretty normal life now.
I'm just saying that to echo the fact that it works, but one has to be really 'committed' to it. It sounds like fixing that will slowly help to fix everything else.
I've no idea if you're religious or not, but quite honestly, prayer and faith has been proven to help many people in difficult situations. It's been a great help to many of my closest friends and family. Mix that with the therapy, meds, and some positive routines, mind you, and it can really work wonders.
I'm not sure how it all works in the UK, but I know Catholic Charities offers free counseling to people, so if you have one nearby and would like a change, it's worth the trip.
All these are just suggestions, but the main thing is this: there are a lot of solutions out there, there are always ways to fix things, and sometimes any excuse for a good, deep breath is just what's needed.