What should I do about having sex?

I don’t want to get a STD, don’t want to mess up hormones with birth control due to risks of that and also don’t want a baby. Also would only want a relationship if we saw each other occasionally so I get plenty of space eg can eat and sleep alone do routine things alone even if we live close. What should I do? Would be nice to have sex with a guy I have deep feelings for too

What should I do about having sex?
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