Relationships after high school

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Hey girls,
So I'm currently in year 12, due to finish school in 4 months and have been with my boyfriend for two years, and lately I've been thinking about my future and of course included him in it.
He has an apprenticeship lined up for next year and I'm currently working at subway twice a week, and my boss told me he will increase my shifts once I'm done with school.
We live around the corner from each other so we used to see each other really often (like 4 times a week) but now we get really busy and see each other 2 times at most. I also haven't seen my dad in months and need to work on my relationship with him.
My BF and I are willing to put in the effort but I'm scared that we are gonna drift apart.
Has anyone been through this or have tips for coping?!