What is the most logical next event?

How to maintain a long distance friendship with your best friend
Text your friend/s every day and ask them how are they doing.
Ask questions about their life, like their school, work, or relationships. Even if they've made new friends, try to always support them by giving advice and talking about their problems.

Pick from:
(A). If you don't know them well enough to do this, simply show up at their home every so often to check in on them. If your friend has friends in school, ask them what they're doing and how they're doing.
(B). If your friend or s seems down or upset about something, try to help them feel better. Making someone feel better can be especially helpful if you don't get along.
(C). Always be there for them, and try not to ignore their texts if they text you. Call your friend (s) often and try to always sound cheerful when they answer your call so, they won't get bored while talking to you.
(D). By spending time together, your best friend will have a sound head start and you'll have a much stronger picture of where their perspective is once they begin the friendship. You can also be involved in daily study sessions where you can chat regularly.
(C).