Think the cops were wrong in this case? ?

I know there is nothing I can do because its over with. I just need my mind cleared. In Jan 08 my bf at the time "committed suicide". I don't believe he done it. He had a house he was working on,trying to get custody of his son, his "wife" finally agreed after a yr to sign the divorce papers and she even had a bf the whole time,the closet I saw him hung in was way to small;i couldn't hang myself in it and i am 5 inches shorter than him,there were bruises on his wrist,no body fluid,traces of drugs in the house and i know for FACT he didn't do drugs,the big give away was the b*tch paid 2k to have his body cremated the next morning with no autopsy. So am i crazy to still believe he didn't do it? i know i can't prove anything it just bothers me.