I desperately need advice for my sanity

My current bf and I have been dating for almost 2 years, living together just over a year. We met on an online dating site, and hit it off. Everything has been perfect, no fights, our personalities are very similar. Throughout the whole relationship I have given him my trust 100% he has given me no reason to doubt him. Never checks out other girls, always pays his part of the bills, doesn't hide his phone or facebook from me. I used to check out his online profile (where we met) because I love his old hair cut and like to look at those pictures sometimes. Today I found his page and looked at his pics like usual... then scrolled down and noticed he has changed some of the information on the profile. It said he was married, (he jokes all the time that I'm practically his wife), not seeking a relationship or commitment, and that his longest relationship was under a year (we've been together almost 2 years). In the "about" section it says "sup, I'm chill are you? I'm in a relationship but like to hang out alone. I sometimes drink, hang out at home and with friends. I like staying in and watching movies." I found this whole situation to be very confusing, and I don't know how to feel about it. I confronted him about it in a calm and gentle tone and he got upset, defensive, and started yelling.. so that made me even more confused.. I even told him that that reaction made the situation even worse. Now, after discovering that he might secretly be sneaking around behind my back, me being an upset girlfriend did the stupid thing and had to check his emails. I found something I was not expecting... About 5 months before he met me he was contacting men about newly bisexual no string attached encounters. This was before he met me, but now I can't help but wonder if he isn't checking out other women because he isn't into them... he tells me how sexy I am, how much he loves me, smacks my ass all the time.... in the beginning of the relationship we had sex all the time, but now we have sex once a week, and I usually have to ask for it... I want to make it clear that I told him I am not accusing him of cheating on me but I need him to be honest about the situation... I still feel like I haven't gotten an honest answer. Now that I've found these gay experimenting emails I am even more confused, I can't be mad at something someone did before they met me, but he kept it from me. He is perfectly fine in front of my gay friends but makes typical guy comments and uses the word "faggot", he also made it clear he wasn't into experimenting with anal, so these emails came as a COMPLETE shock. Is he a liar? He is not the man I thought he was. I have lost my trust in him, and I want to say something about what I found but I don't want him overreacting that I went through the emails. By the way I worked at a sex shop for 3 years, am totally into kinky shit and experiments, and am a very open person... and he knows this, that's why I find it so weird that he would not tell me this. I planned on marrying this man and having children with him, now I am completely lost and I need an outside look on things.

I'm sorry. But I see no reason of why you should be upset with him. People don't lie to come out and just say they're bisexual it needs time, and you need to respect that. But even if he is, he choose you, not anyone else. You should be happy. And his profile that you guys met on, sounds nothing wrong to me. You should just forget about it all. And apologize. You're blowing it out of proportion.