Is it "between you and me" or "between you and I"?

"Between you and me." After a preposition, English always takes the object form.

Is it "me and him went" or "he and I went"?

"He and I went." Subjects of a sentence take the subject forms he and I.

Quick answer Canonicalizes to Me vs. I

Is it "my friend and I" or "my friend and me"?

Q: Is it "my friend and I" or "my friend and me"?

Depends on the slot. My friend and I went… for the subject; for my friend and me for the object. Test it by removing "my friend and" — whatever pronoun works on its own is right. I went to the park → my friend and I went. She saw me → she saw my friend and me. The mistake happens when "I" gets used for politeness regardless of slot.

i · AnswerOne line, no lecture

Depends on the slot. My friend and I went… for the subject; for my friend and me for the object.

ii · A little moreWhy this is the one to keep

Test it by removing "my friend and" — whatever pronoun works on its own is right. I went to the park → my friend and I went. She saw me → she saw my friend and me. The mistake happens when "I" gets used for politeness regardless of slot.

Related entriesKeep going

Less vs. Fewer For things you measure versus things you count. Usage
Who vs. Whom Subject versus object — the pronoun doing it versus the pronoun it happens to. Usage
Lay vs. Lie You lay something down. You lie down yourself. Usage
Under vs. Fewer than Position in space versus a count — ‘under’ isn’t always a substitute. Usage