Looeez -- I feel your pain. I'm a slug on hills, too, but I know I am getting better. I'm still not good on them, but I'm better than a few months ago and I know I'll be better yet next year. Don't let 'dem hills mess with your mind!
You know you can do them so now you are just moving towards doing them a little faster or with a little less effort. There's some tips and tricks to getting up hills. Stay relaxed, sit a little more upright so you can breathe better. Don't tense up which will increase your heart rate and make your breathing harder. Pull in big breaths through your nose and blow them out hard through your mouth. Slow down your cadence, put your hands on the top bar with a relaxed grip and focus on smooth pedaling rather than mashing on the pedals. Try not to look up to the top of the hill.. find a target like 20 feet in front of you and focus on getting to it. Then find another target a little further away. Congratulate yourself as you reach each small target. Maybe think of a mantra that you can say over and over -- "I eat hills" or "I'm the best" 
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"I never made "Who's Who"- but sure as hell I made "What's That??..."