When you have something that you're excited about, you get really entergetic about it. Which leads to strong rambling, really fast and never-ending.

Since you had met Dazai, and since he became your boyfriend, he was the one to deal with this. Not that he complained, but he was the one who heard all of your rambles.

Today you were having another, your head was on his chest as you rambled; he was playing with your hair and listening.