Are you allowed to check yourself into a mental clinic?

To be honest you should never consider suicide especially over a guy...and i am a guy telling you this...not all guys are jerks! however i think that you need to get away from this relationship...not totally break up but slow it down..guys are not worth your full emotions especially if they are going to hurt them..this guy seems like all he is caring about right now is to hurt you and you dont deserve that....u seem like a very sweet girl and should never cry over a guy.....if he cant make you happy all the time he shouldnt be making you anything at all.....dont worrk everything will get better...i think you should take a deep breath and realize all the support that you have....