First of all, I'm sorry you feel so bad. Depression is so cruel to us.
I can understand how you feel.

One or two close friends is so much better than having many who don't fully understand and support you.
I hate that you lost some friends, but they're not true friends or worthy of your time. People change, situations change over time, and sometimes some friendships can't bend with the times.
I'm glad you have some really great friends. Stay grateful for them!

I hate that you feel you've missed out on so much.
It's so hard to watch others around you doing things they take for granted, when you'd give anything to have them.

If you can't have biological children, you could consider adoption if you get to the place in your life when you can handle it.

Mainly, just focus on you. No other person on earth can complete you more than YOU. It's so hard, but you have to take care of yourself and enjoy the little things in the day. Don't worry too hard about what's in the future. Easier said than done. But keep taking it one day at a time.

I hope your pain goes away and you have better days. You definitely deserve them.
I wish you all the best! Just hang in there.