I'm planning to pour bleach on my boyfriend's suit.
That is crazy. Is there a reason why you would pour bleach on your boyfriend's suit?
The last time I saw him he told me he hated me so... this is my response.
Not only is it wrong to damage his suit, but you will also end up fighting even more because nothing good will come out of destroying his suit. If you hate each other why are you two still together? Either break off the relationship or work it out.
I don't care. He keeps messing around.
You two seem to have a pretty toxic relationship and should probably move on to something healthier. Damaging his things is an immature response to the problem.