My boyfriend and I broke up when we had an argument over paper cup.
I asked him who use a paper cup in my bathroom because I didn't remember at all if I used it or not. Then the argument started and he told me to quit seeing each other. So I moved on. Now he told our friends that I dump him because I accuse him having an affair.
Now he told me to give his phone number to my single friend that are available. What kind of crap is that?
Rock The Boat
Sounds like one of you was ready to end the relationship but was waiting for an excuse to do it. If you're both angry then it's common at the end of a relationship to just instead of continue fighting or resolve it to just say "I can't do this anymore".
This might be a lucky escape really rather than having a longer drawn out period where no one is confident enough to end it and you both suffer together.
I would just move on and forget about him. Let him say what he wants. I would strongly advise changing your number and warn your friends not to hand it out.
Foofa
When people say they broke up over silly reasons it's never really the silly thing that caused it. The silly thing was the final straw on top of some deep misalignments in expectation. The trick to a successful breakup is to have no further contact with your recent ex. This is more difficult when you share a friend group but people in such friend groups are generally used to having to pick one side or the other following a relationship rupture. So some of your mutual friends will take his side and some will take your side. That's just kind of how these things tend to work.
Dv8s
Someone did use your cup and it wasn't you. Your ex boyfriend didn't break up with you because of a paper cup argument, he did it because he was tired of catering to your selfishness.
rustbucket
A lover's quarrel that's gone too far time to forget him and move on.