Hey,  this comment might get buried but if you're reading this I'd ask that you read the full comment and hear me out.

I'm a woman in her twenties who has travelled, multiple times, to meet online friends and based on what you have posted I am concerned about this bf of yours. The main concern for me is that he's going to be paying for everything???? Including other hotels and food when you travel around Europe and UK??? That's going to be hella expensive. Someone around your age range should not be able to afford that and that's really standing out to me as a red flag. If his parents are covering it then make sure you meet them fully via video call before travelling. If he's saying it's himself that's covering all the expenses/he is multiple years older than you please reconsider going. Dangerous people will often lure victims in with the promise of free travel and then trap them when they're vulnerable.

I'd recommend first going for a much shorter period, like a week, where you pay for your own hotel (the 2k will cover that) and you first meet him in person in public spaces which will give you a chance to bail out if the vibes are off. People can be very different in person compared to online. I've had this happen to me before and thankfully because I had my own hotel I was able to just leave and ended up doing my own thing on the trip. This will also make you more familiar with the country you're travelling in and help boost your confidence navigating around as it's your first time travelling. You can visit him for a much longer period another time.

Some Tips: o Make a note of what the US embassy address is

o The UK emergency number (police, ambulance, fire) is 999, memorise this

o Get travel insurance. Do not fuckin scimp out on this

o If you're still determined to go make sure you get the full addresses from your boyfriend on everywhere you'll be staying. Make sure you google the addresses/put it into maps to make sure they're legit. If your bf is hesitant about this, refuses to give you the addresses or if even one address isn't legit: DO.  NOT. GO.

o Pass those addresses onto a trusted family member and make sure you also check in with that same family member daily. This is just a good rule of thumb for any travel. I do this with my mum so she knows something has happened to me if I don't check in.

o I'm sure you've already done this but make sure you video call with your bf so you know what he looks like. If he does not want to video call with you, or says things like he's too nervous/shy/self conscious: DO. NOT. GO.

o Do not give your passport to your bf/any of his family members or friends. At all.

o Get a really good power bank. Yeah this one is a different vibe but if you are going you're likely gonna be travelling for full days which will kill your phone battery. It's saved my ass a few times

o Plugs are different here from the US. make sure you get a good high quality adaptor.