In-person to Long Distance

My in person relationship of 2+ years has recently switched to Long Distance because of their new job opportunity. Its been about 2-3 weeks so far. I'm feeling very conflicted because it seems like I'm the only one worried about trying to have our relationship stay afloat with Long Distance. I previously communicated that I am not certain this would work but I would obviously try. Granted, my partner has been busy with his new job but knowing him, a grand boost of effort will not come if that makes sense. We are both early 20's and he is my best friend. Effort has been low even before long distance. I'm just not sure what to do or how to navigate a long distance relationship. I've read people saying there should be a goal of closing the gap but we went into this situation with a go with the flow mindset. Before the distance, I have felt the only one to bring up the big conversations or think deeply about things. Any advice truly helps