Should I text my crush?

I met this guy a few months ago. He was lovely and he really liked me, unfortunately, I stupidly, but politely, rejected him because I was crushing on this other idiot instead. He was a really good guy and I take responsibility for the fact I shouldn't have rejected him. We follow each other on Instagram and I guess things are good but I haven't spoken to him in months and when I did it was brief. Do I look desperate messaging him to say hi etc. Would he think I am desperate or be happy I contacted him?
Should I text my crush?
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