I'm thinking of disappearing

Throwaway for obvious reasons, but I am (19M) and the past couple of months I've been heavily considering just disappearing off the face of the earth. The only thing that's keeping me grounded is my girlfriend (20F) of 2 years, but our relationship has been on a down slope for a while. For the past while I've been thinking of what's going to happen when we break up, and I've come to the conclusion that I just want to disappear. I've already figured out a plan. I'm just not sure if that's something I should do. I've been saving up for a house and I do owe some people money. So, I want to just leave cash envelopes for everyone I owe money too, deactivate my social media accounts, change my name (I have 5 names, all common, so I wouldn't have to do anything legal wise) and move to a city 4 hours away from mine. I feel shitty for wanting to do this, but I don't feel guilty, and at some point I think restarting would be the best thing for me. I'll look at comments and reply after I'm off work this evening, and advice would be nice.