Since we don't know your respective ages it's impossible to comment. If you're both adults that shouldn't be a problem.
However it's good to note the immortal words of Anthony DiNozzo who remarked, "A turkey buzzard is twenty years older than a cougar. She still likes to hunt but doesn't have the strength to bring down her prey."
It's a bit unusual but as long as you are both over 18 there's no problem.
Long term relationships with a greater age difference of more than 7-10 years, tend to be statistically less successful than those with a maximum difference of 7-10 years.
Of course there are exceptions, but it's a long shot.
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