taxi

I hope this falls under the right topic, but I have a question regarding an early flight (7 AM) out of Barcelona and where I (and my boyfriend) should stay the night before.

Is it worth it to stay at a hotel that is very close to the airport (but pricey) or should I stay at a hostel instead, and take a taxi? My only concern about the hostel is that I’m not sure if I will be able to check out early enough (to get to the airport 2 hrs before my flight). Any advice? Anyone else been in this situation?

Any help would be greatly appreciated.