I’m a heroin addict?

Ok, to start im a 20 yr old male. I started using heroin about 5 or 6 months ago, when i was 19. I really hate what ive become. I have an awesome girlfriend, who doesnt have any idea about my problem, actually, none of my family knows. im a very skilled guitar player, but havent done anything productive since i started using. I know that in a twisted way, im fortunate to be seeking help this early in my addiction. so yes, my withdrawal period will be easier than someone whos been using for years but, at the same time, im to far in for it to be anywhere near easy. going cold turkey is not an option, i tried, and became extremely sick, and i never want to feel that way again. also an in house rehab center wouldnt work, because i have a fulltime job and i really dont want anyone to know about this, my family, friends, or co workers. Once im off, relapsing wont be an obstacle. It wont happen, im so ready to be off this damn drug. man, a methadone treatment would be ideal, but i want a doc.