let alone three/ love angle/ pill-head

Would you tell me whether I am right with my interpretation of the expressions in bold in the following sentences?

It’s hard enough for one person to keep a secret, let alone three. And then there’s the love angle. I mean do you and Sam really want that little pill-head around, now that you have the money?

I can’t take seriously one person who wears anything representing their commitment to remaining a virgin, let alone three.

Not many British bands these days have more than one million-selling album, let alone three.

let alone someone or something = not to mention or think of someone or something

love angle = love triangle

pill-head = an obnoxious person

Thank you for your efforts.

let alone someone or something = not to mention or think of someone or something- Yes

love angle = love triangle-- No . ‘Love perspective/topic’

pill-head = an obnoxious person – Possibly, or it might be more specific; he might take drugs.