Helpppp!

So I went back to a job that I left a year a go.. (new manager and associates) well I’ve been there back for a month now & my boyfriend surprised me with getting us an apt he live an our away.. so I’m moving... but how do I tell my boss?? I’m so nervous I don’t want to not show up anymore I rather put my weeks notice but ugh like I feel so bad tell my manager since a lot of people already left (moving on with there lives) ... but i want to make it work with my boyfriend since we have two kids.

How do I tell my boss??? With sound bad that I’m leaving next month.. can I tell her in person? Should I text her ahead of time at all to let her know I’m going to talk to her??