idk what to do

as most of you know its been a very long time since i last was on here. well for starters a lot has changed. i am no longer with that girl, i am now with a guy. we have been together since November 11th, 2013. we have known each other since middle school and since we became a couple i realized he is the love of my life! we have been through a lot of shit. i have also taken a lot and am still with him. the first time we broke up was because he kissed one of his ex's and he said he liked it and wasnt sure if i was what he wanted. we were broken up for a month before he came back and begged for me back saying how stupid he was and how he wanted to be with me forever. me being completely in love with him took him back. that was around 8 months of us being together. now we have been together almost a year and 5 months. well about a month ago i found text messages between him and this girl from out of state and they were "i love you" texts, "i cant wait to be with you" texts and blah blah blah. i confronted him about it and he said he was so sorry and that he was stupid and didnt know what he was doing and didnt know why he did what he did but he never meant a word he told her and that i was all he wanted and didnt wanna lose me. again i stayed. i made him block her from his phone and all social media sites. he said he would do everything to prove to me that i am everything that he wants. we are on the same phone plan, have made plans to move in together, & he said he wants to get me a promise ring. i already have his ordered and he is looking for one for me. i love him so much but i dont know how to shake my fear. am i wrong to be scared? how do i make it go away? i know ur not suppose to let someone be so close that u physically and mentally need that person to go on but i do, i need him. ive never experienced a love for someone like this before. so strong and true. he is everything ive ever wanted and more and i want this to work. how do i battle my personal demons and shake all my fears?! HELP!! :'(......