[shimmeringfaerie]

Personally, yes, I think your drinking habits sound unhealthy. For two reasons:

One, your friends are worried about you. They know you better than most of us do and if they think there is a problem, I would most definitely be listening to them. Real friends don't say things like that if they aren't genuinely concerned.

Two, you say that you are drinking because you are upset. If you are using alcohol as a coping mechanism, then it is definitely not healthy for you. Alcohol shouldn't be used to hide from life.

Truthfully, I also think the amount that you say you are drinking is too much. However, I don't drink myself, so that's just my personal opinion.

I think you should talk to your friends. They seem to really want to help you, so let them. Alcohol addiction is a terrible thing to have to deal with and it's incredibly hard on the people around you as well.