Is requesting vacation 2.5 months apart acceptable?

I want to take another vacation coming up. I plan on giving a months notice. Right now it's been 1.5 months since my last vacation but it will be 2.5 months by the time it gets here. We have to use our vacation by a certain time or we automatically lose it. We still have time before that happens though. I still kind of feel ridiculous asking for vacation again. It kind of feels like I just got off of my last one in some ways. I feel like a lazy employee in some ways. Like my boss is going to go, he wants vacation again? Is this just ridiculous, over worked American culture that has me feeling bad for taking vacation time? I feel guilty putting in a request.

Not too soon. Your entitled to use pto.
A bit too soon
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Is requesting vacation 2.5 months apart acceptable?
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