Man [42] attempted to impregnate me [18] without my consent. Police investigation seems to have hit an impasse.

I don't know if the ages are legally relevant but I included them to be on the safe side.

This happened after I organised a hook up through a dating app. We met up a few times and on the final time we met he attempted to impregnate me.

I reported it to the police immediately. Sample was taken. An arrest was made. I gave my statement WITHOUT a lawyer. He gave his version of events WITH a laywer so I was already at a disadvantage.

The Public Prosecutors Service have decided that they did not have sufficient evidence to press charges against him.

Is there a way I can challenge this?