It's quite simple

We make time for the things we want to make time for.
Anyone who says they are too busy means they have other things they would rather do. Period.
If someone wants to see you, they will.
If someone wants to find the time to read a book or raise a puppy or make a phone call they will.
It's not personal - it's not about you.
Someone may be ignoring you, mistreating you, sure.
More likely... they are simply doing what they feel they need to do to accomplish the things they want to accomplish. And unfortunately, you aren't on that list.
Don't be discouraged.
Someone else WILL put you on the list. And no, you shouldn't sit there and be unhappy. Contrary to many beliefs, life isn't about suffering. It's about dealing with suffering and moving beyond it, raising yourself above it. Choose to be hopeful. Choose to tilt your eyes to the sky and feel the wind on your cheek. Life continues to move and all you have to do is open your eyes and be willing to fly. Scary? Maybe. But it's worth it.
Love,
M