I love my boyfriend but I don't feel an intimate connection with him when I meet him. why?

my boyfriend and I have been together for 3 years now and we love each other so much. we have been through many ups and downs together and have always supported each other. we met online during the covid period so we couldn't meet each other for at least 6 months. when we did, it felt as if i was meeting a stranger. i knew it was bound to happen
then he had to go out for his higher studies so we couldn't meet each other much and whenever we do, i don't feel an emotional and intimate connection with him even though i love him so much. i also feel a little uncomfortable while being intimate with him
can anyone please help and tell me what the problem is
I love my boyfriend but I don't feel an intimate connection with him when I meet him. why?
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