Hi there
I am currently 9 days clean from opiates ( the longest I have ever made it!) and I am feeling great so I promise you the once you get past the hurdle of physical withdrawals everything gets a lot easier. The key for me has been remembering that I have changed the physical and chemical composition of my brain during my drug use. Dont fret though the brain is an amazing organ and as soon as you stop it begins to return to your pre usage state. Try to focus on the fact that every time you think of using but resist, you reinforce those "will power" pathways in your brain. Every minute of sobriety is a success in terms of your neurobiology!