Used when feeling or being perceived as not fitting in with the rest.

Feeling Different

The phrase is neutral and doesn't imply any negative judgment or exclusion.

Neutral Tone

Mostly used referring to a person's situation in relation to a group.

Expresses being literally the only person not included in some activity.

It's not necessarily negative but can express a matter-of-fact situation.

Often describes a temporary situation rather than a permanent role.