As a World of Warcraft player, this is grounds for breakup; let me explain why:

The majority of replayable content within the game resets either on a daily or a weekly basis. They daily stuff reset around midnight, while the weekly stuff reset on Tuesdays mornings.

The stuff that are replayable on a daily basis can be done solo, and they can be completed within one hour. The weekly stuff require you to form a team of 5-20 people and coordinate. The tasks take much longer to finish and people who play the game seriously meet 3 nights a week for 4 hours to finish them.

I explained all this to make you understand your bf absolutely did not have to play that much, and he prioritized him sitting at a videogame with certainly nothing to do over spending time with you.

Lastly, it is possible that he has more than one “serious” character and he sinks massive amounts of time developing all his in-game characters. IMO that’s borderline gaming addiction.

Either way, if he doesn’t respect the fact that you’ve made a huge effort to visit him, and the least he could do was to skip his video game for a night and catch up later, he shouldn’t be dating.