I think you’ve rather eloquently managed to sum up how a good many of us are feeling right now, but I think that, in the process, you’ve also showed that you are an articulate, passionate and intelligent person.
That says to me that you have got a lot going for you (friends can be fleeting and it takes a true friend to stick by you through the very hard times) and, despite fearing recovery, you’d make a success of it!
Yes things have been delayed and plans changed, but you need to remember that being a success in life isn’t just about the material things and how society judges you (and screw anybody who does judge you!).
I think that by battling through this illness and persevering on a day to day basis, you
are successful because many others would have given up long ago.
I know exactly what you mean about a “sense of purpose” because I’m a similar age to you (37) and also mourn the career I have lost and the children I now won’t have. But something I’ve realised is that you can find a new sense of purpose if you look elsewhere and find yourself new goals that fit within your limits.
I know you probably hear this all the time, but have you considered volunteer/charity work that might be able to give you a new sense of purpose (and might be a good way to meet new friends). It’s normally pretty flexible so you can get involved on your good/better days when you feel up to it.
There’s time yet to find the partner of your dreams and you never know what’s round the corner so don’t give up yet!
Just know that you are not alone and that - I’m sure - everyone in this forum is rooting for you and will undoubtedly support you in any way that they can on any road to recovery!
