Dylan was right in his request to Alex
Dylan was absolutely right to ask Alex to give Kiley some space and to back off. From Dylan's perspective, he couldn't even go on one date with Kiley, just the two of them, because of Alex's insistence on always tagging along with them everywhere they went. Dylan tried to be sweet and friendly at first about the situation, but he also wanted some time with just his girlfriend. He also saw how rude Alex was to Kiley's friend, and I wonder if Kiley told him that Alex kissed her. I don't blame Dylan at all for asking Alex to give Kiley some space and back off.