if u do not pay child support, u lose all control over ur child. why do u want to do that.
Child support and custody/visitation (thus "control") are two entirely different things.
Failure to pay CS will rarely (and I mean rarely) result in the loss of visitation/custody (legal "abandonment" notwithstanding). They're two separate legal entities and failure to do one will not generally mean the other will be negated (though failure to do BOTH just might....).
Dad needs to go to court and get C/V sorted out. The only way Dad avoids CS is a) he obtains full physical custody, or b) Mom remarries and Dad allows the new husband to adopt the child (this of course means Dad signs over all rights, and would become a legal stranger to the child).
I know it might seem pedantic of me, but CS is NOT meant to go to the child - CS is meant to reimburse/provide resources to aid the other parent in supporting the kiddy. If this means Mom uses the money (and no, you're not legally entitled to have Mom account for how she spends the money - asking a judge for this will get you on the wrong side of the judge very quickly) to pay her bills, her weekly bottle of wine, her car payment, whatever, then that's absolutely ok.
OP - get thee to court and get your rights established pronto! File for joint legal/physical (if that's feasible). Courts are currently NOT in the habit of awarding sole legal unless there's a jolly good reason for doing so (and Dad hasn't indicated this).
Good look OP - divorce sucks, but you can help your kid (and yourself) get through this.