My boyfriend is being distant?

We’ve been together nearly 3 years and he used to text all the time and FaceTime or call me at least every other day.

Recently he’s started studying and I know that takes a lot of time and focus but he just seems very distant from me now. He says he doesn’t check his phone much anymore and he prefers to call but doesn’t call some days (I take it down to his studies he has a huge assignment due soon) and I asked him if we’re ok and everything and he said we were.

he recently told me I’m a bit clingy and he likes space so I’m trying to be less clingy and I’m doing quite well. Do you think it’s just his studies making him distant?
My boyfriend is being distant?
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