Rachel,
I'm always saddened by this type of thread , why does marriage mean you cease to be a person with your own rights and often just become a possession . No denying you have your problems to sort out but you are entitled to your privacy , your wife had no right to search your personal computer . Also being kicked out of a family home should have been open to discussion and not accepted as the done deed !
I admit I went through a stage when I nearly ended my life but mine wasn't planned or premeditated , the fact you were planning or considered it was a cry for help so please keep going with professional help , life is too short and believe me your life is more important despite how you feel right now .
Even if you still love your wife , the damage is now done , she has lost the faith in you and possibly the love for you . You daughter is your lifeline please accept the help she offers , I owe so much to my daughter despite the heated battles she had with my wife .
Yes you can be happy again , I'm happier than I've been in along time , so hang in there and believe it can get better .