Like Eric already has mentioned there is nothing wrong with you.
I had a relapse after 5 years of sober time, it happens and I hope it never happens again. It was hard work to get back on track. Same as you. But the good part was I knew what to do. What where the things you did to mantain your sober year back then? Are you doing that now? Can you add something? Like AA ore online meetings for example?
Here is a thread you may find useful too:
Keep coming here reguarly, it helps to be here much! 