Welcome! I have not been officially diagnosed either and I too am convinced.

I think there are some overlap symptoms with my bipolar.

following are symptoms I experience

Frantic efforts to avoid real or imagined abandonment. A pattern of unstable and intense interpersonal relationships characterized by alternating between extremes of idealization and devaluation

Identity disturbance: markedly and persistently unstable self-image or sense of self

Impulsivity in at least two areas that are potentially self-damaging (e.g., spending, sex, substance abuse, reckless driving, binge eating)

Recurrent suicidal behavior, gestures, or threats, or self-mutilating behavior

Affective instability due to a marked reactivity of mood (e.g., intense episodic dysphoria, irritability, or anxiety usually lasting a few hours and only rarely more than a few days)

Chronic feelings of emptiness

I think that is seven of the nine symtoms that are typically associated with borderline...