Are Age gaps of 9/10 years a matter?

Guys, i actually have a crush on my neighbour for a long time. When i first saw him, i really couldn't guess that he was actually 9/10 years older than me. He was a university student & i was in 9th grade then. The age gap seems pretty inappropriate to some of my friends i've talked with. Is it somethings bad to have crush on a person who is 9/10 years older than me?(that's why i've not dared to talk with him)

Are Age gaps of 9/10 years a matter?
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