I suspected I had ADHD and nothing else when I went to get diagnosed. One of the things I thought was a problem caused by ADHD was how I feel about other people as well as not having any sort of neutral emotions. Turns out I have Borderline Personality Disorder (and what was formerly known as Asperger's still when I got diagnosed), which I hadn't even heard of until I was diagnosed with it.

If in doubt, get checked out. A lot of mental illnesses have overlapping symptoms and it takes a professional to sort them out, and I do see a lot of people simply self-disgnosing based on how they feel when seeing memes.