Loneliness Support Group
Loneliness is an emotional state in which a person experiences a powerful feeling of emptiness and isolation. Loneliness is more than the feeling of wanting company or wanting to do something with another person. Loneliness is a feeling of being cut off, disconnected and alienated from other people. The lonely person may find it difficult or even impossible to have any...

personal opinion inbound:
if you mean not standardized, then yes, it's difficult to link with other individuals. i lived my whole life without friends because i don't follow most social canons, i only had partners to my side. sometimes if you don't follow said canons (such as image, wealth and you-name-it) chanches are your possibility to interact with others, and to make it last, drops pretty much.
if you mean on the mental side... that's a whole different story. first off, it's not your fault. if you have a condition, chances are people without that condition can hardly understand it and hardly "play along". it's not their fault either, so to speak, many are "ignorant" about what lies within the head of an individual with problems. many others know and just don't want this burden on their shoulders. but that doesn't mean you have to feel guilty for it.
You can get through it... How old are you? Maybe try to find a hobby that you really enjoy; and if you happen to find people with similar interests doing the same thing... then thats an easy way to make a friend! God bless!
Gentle hugs