I think I've built up a caffeine tolerance. I've drank coffee and tea habitually for over a decade and for a period of time I drank a lot of coca cola. I don't

I think I've built up a caffeine tolerance. I've drank coffee and tea habitually for over a decade and for a period of time I drank a lot of coca cola. I don't drink coffee to feel awake/energized or stay awake. I just drink multiple cups a day out of habit. I like having a hot drink to sip on while I am doing other things. I've given up coffee for 1-2 months before and didn't feel any different. I didn't get any buzz when I started drinking it again. I've tried to replace coffee with just hot water but it's not the same.