That anyone who has ever cheated should just give up on love and happiness right now? That's like telling all first time criminal offenders not to bother ever getting jobs or educations because chances are they'll be back in prison and it would be unfair to their employers to trick them into thinking you could be a viable employee.
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<br>I think the better advice/approach is to recognize that it happened and ask yourself why it happened. Then you can deal with any consequences that might arise as a result of either the act or the reason behind the act. Really, in most people's teens/twenties cheating happens and both parties move on, probably for the better.