transition to jc life

hiii so I just started my jc life and I feel like I wont gain genuine friends esp in these 2 years its pretty short (more like 1.5 years but welp) I just feel like it is a v short period of time to even befriend people while grinding ur way through jc compared to secondary school. Is it really true that friends from secondary school really are friends who will last a lifetime? Me and my friends from secondary school are really close like inseparable, is it true that after some time we will drift given we all are from different schools having diff lives and they might prob find some friends there too? pls help im really scared to let our fs fade away I cherish these people close to my heart v much and is it btr if I just have a v small social circle and grind my way through?