<human>: Summarize the given text in a few sentences.

My boyfriend (I'll call him Bob) and I met a couple of years ago and have been dating since. I make a lot less than Bob (roughly half his salary) but also have fewer expenses. Our "fun money budget" is roughly the same.

My birthday was yesterday. Bob surprised me with tickets for a trip to Hawaii over President's Day week. He's clearly been planning this for a while and I was so touched - up until I realized that his "gift" was just the plane tickets. The hotel, activities, food etc for this vacation he expects will be handled the way we handle our other expenses, ie, split down the middle.

My portion of the hotel + everything else will be roughly $400.  He's got everything booked and already planned so there's no chance of downgrading or not going on the trip. The thing is that I can technically pay for the trip (I have savings and an emergency fund) so I can't say I can't afford it. It's not like I don't have the money, and it would be nice to take a vacation - but I probably would have put it off for a while (I'm rebuilding savings after some unexpected bills this fall) or chosen something cheaper if I was planning it. It's just not where I would have allocated my budget, if it was totally up to me.

I feel like instead of a present, I basically got a bill for something I didn't sign up to buy. Bob doesn't get why I'm angry - he says the plane tickets are a generous gift (they are! The tickets cost more than we typically spend on each other for special occasions) so I shouldn't be mad. But I feel like he made a ton of decisions that are going to require me to spend a lot of money on something I wouldn't have even picked - and he's trying to frame it as a great gift that I should be super thankful for. Instead I feel stressed and pissed off.
<bot>: Boyfriend gave me a "trip away" for my birthday but turns out he's just paying for plane tickets. Am I justified in being annoyed?