Is it normal that i only drink coffee and nothing else?

You're supposed to drink 8 glasses of water a day.

A lot of people do it but energy drinks are a waste of money. How much do you spend a day on that?

It's not healthy at all, but its your body and if it's what you like drinking then go for it.

totally normal

You probably gave yourself a caffeine dependence. Yeah this is very unhealthy, I hope you can quit.

Well for your own health you shouldn't, try drinking enough water since coffee dehydrates the body..

Caffeine can dehydrate you, so be careful, especially if you live somewhere hot or if you're working out. A caffeine overdose can also cause heart palpitations, so watch out for chest pain.

You have to give the coffee a rest. Aside from the caffeine any additives you put aren't very good for you. Seriously try to cut it back and drink alot more water. At first your body will need to adjust but after a good week or so you will feel alot better and you will save yourself alot of health issues down the road