If you want something in life, wishing or praying for it isn't going to help. That will just get you more wanting.
Instead, try being what you want. If you want a better relationship, be a better partner. If you want better friendships, be a better friend. If you want prosperity in your life, embody the feelings of being prosperous.
Banish thoughts of lack, self pity and worthlessness from your life. This is where a trained mind comes in handy: when your thoughts turn to things that don't serve you, you can divert them and get them back on track.
Training the mind does not happen overnight, but with consistent and persistent use of things like meditation and imagery, you will find that your thinking patterns are more positive and you are able to be that which you want.