My boyfriend is a DOTA addict

I don't know what to feel or react but I think I'm jealous with my boyfriend's addiction in DOTA. It's not that he doesn't have time for me. It is only that DOTA seems to be of higher priority compared to our dates. Last Saturday, I told him that we'll visit the newly-opened taco resto in town, after its announcement in a foreign socials, but he cancelled it due to his DOTA tournament. Does this mean that he values DOTA more than me, or am I just paranoid? I need your help on this.