Maybe it's time for renegotiations on the parameters of your relationships with them. It sounds like it's a couple + you, the way you describe it, rather than a her + him + you situation, KWIM?
The world opens up... when you do.
Oh, oh, can't you see? Love is the drug for me. ~Bryan Ferry
"Love is that condition in which another person's happiness is essential to your own." ~Robert Heinlein