This is overlooked so often and it's hindering more than helping. Happiness comes within you, you have to love yourself. Sure, material things and people can bring you happiness but you should never, ever make them the point of your happiness.
If you want to manifest anything work on making yourself happy, to get to where you want to be you have to know, trust and be happy enough to know it's there waiting and you also have to know that you'll be absolutely fine without it.
Once you reach this stage you will see the magic happen. Things that would have sent you on a downward spiral before are things you will now laugh off. You have a buffer of time, use it to your advantage. Your bad thoughts can't instantly pop into reality, imagine if every thought you had manifested instantly. Imagine that chaos.
So instead of sitting around wondering "Where's my desire", go for a walk, go buy a coffee, talk to a friend, pet a cat, do anything that'll make you happy.
Sometimes when we're obsessed with desires we often forget the rest of the good things we have, appreciate those. Put good out, get good back.
For someone else to truly love you, you have to love you.