He doesn’t keep his word or follow through. You’ve been begging him to put together that IKEA bookshelf for months.
Anslem says: Not being able to keep one’s word leads to trust issues, and once that happens you can kiss any hopes for a harmonious relationship goodbye. Some people are naturally flighty, but that doesn’t absolve them of respecting your time. This may have more to do with character flaws than whether or not someone likes you; but why would you want to be with someone you can’t count on anyway?