

Well. Emotional swings like that can occur as part of a manic episode specifically. Mania just means the emotions come faster than usual, not that they’re good. Ppl w mania are actually frequently extremely angry, usually because they’re going a million miles an hour and don’t understand why everyone else won’t just keep. tf. up.
But yeah if op has always just been like that consistently without any ebb and flow over month’s / years then yes it points more towards a thought disorder. I used to have a really cool infographic from a textbook on the differential dx between borderline, bipolar, and adhd since they can all have very similar presentations or even just be comorbid in certain patients.
I’ve actually seen a good few patients who we all swore up and down were borderline then the meds would click into place and oh. Look at that you really were just bipolar. huh. (I say all of this having a childhood dx of ADHD, an adult dx of borderline, and a current psychiatrist who thinks I’m bipolar so…)
Every once in a while a guy will know something about women’s bodies that makes me go “ooooh OK that one’s actually really like kinsey 0 straight” instead of some other weird combination of interests that are approximately straight in a mostly possessive way. Sometimes I’ll hear “straight” guys talk about how gross vaginas are but then you hear a guy talking about pH balances and lactobacilli and it’s just really obvious which guy actually wants to be in one.