I stood up and shouted in her ear
Why did you shout into her ear?
I told her how much I loved her. I was shouting from the heart.
Shouting in someone's ear isn't good because you could hurt their eardrum. If you want to tell someone how much you care about them you should tell them in a nice way, not by yelling.
I can't help how I feel. My feelings are raw.
I understand you were feeling extremely enthusiastic at that moment, but next time if you must express yourself, give that person some distance and don't blare it into their ear. You might end up damaging their hearing from being so close and loud.