HI there Scarlett06 and thanks for your heartfelt post!
Yes you are wandering a bit with your options - maybe I can help just a little with your thoughts to become more positive for when you are away.
Firstly, why are you expecting a fight with your partner - if so, over what? Guys can be insecure creatures and he may worry about who you are seeing when away, or what you are up to. One way to show him your appreciation is to place 'Post it' notes all over the place just before you leave, where he will find them gradually eg sock drawer, pants pocket, fridge etc saying how much you are missing him and love him. Be imaginative and don't hold back. Or you could actually write letters in advance an post them every second day with similar messages. Or do both! Surely that will calm him down, how could you fight after all that love?
With your PC, make sure you lock it securely with a new password. Even back up all the contents before you go, onto a separate hard drive or to the cloud.
This bit's important - Discuss your date options with him and be sure to tell him you are going to miss him like crazy but have to see your family and sort out your things. Don't mention Louis as your partner might think you are putting the bird before him! Getting him involved with your decision making will show him you appreciate his thoughts and value his opinion.
I hope this helps just a little bit Scarlett06 - I am very happy to discuss at any time if you want to.
Enjoy your trip and catching up with family and Louis!