Would it be wrong or bad idea if I contact one of my old male friends?

We were friends since 2012 continued to be friends till 2018 he had a crush on me in 2014 but anyways we fell off, grew apart or whatever but lately i been wanting to contact him the issue here is he has a girlfriend and i have a boyfriend but they both have male and female friends but my boyfriend is different he is the jealous type but i just want to know about him and possibly be his friend again
Would it be wrong or bad idea if I contact one of my old male friends?
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