Are you sure you are addicted to music and reggae music in particular? Usually an addiction is something that we do that brings negative consequences because it rules our life. For example work...a work addiction would bring unbalance to a person. From your post you seem to have found something that is fun and you enjoy doing it with people that you love!
Addiction does not have to be negative. Positive Addiction - a concept based upon the presumption that some life activities wherein an individual feels a requirement or impulse to engage, like meditation or exercise.
The addiction comes into play when a person engages in an act or activity that they feel compelled to do and it interferes with their regular or ordinary responsibilities. If going to concerts stops you from earning a living and thus puts you in peril of losing everything then it could be considered addictive. There are lots of activities that we can engage in or things we can ingest that are good for us but too much can become bad. The point is that if the thing takes over then it can be considered an addiction.