What to do? What to do?

I need some serious help on this situation I am in. I have been dating this guy for over a year and I do love him and he loves me (so he says, but lately, been doubting that due to recent events). We are in talks about getting married and all that good stuff, but lately, I have found myself lashing out at him based on a friend's'feedback on what THEY think is going on in our relationship and what SHOULD be happening at this point in our relationship. Hearing their constant view of what our relationship should be , I in turn project their beliefs onto him, basically blind siding him with my non happy attitude which is getting worse every time we get together. Is he at his wits end? Yes, but he continues to love me and stay with me. I am by no means trying to get rid of him, but I am finding that I am drowning in pure negativity surrounding my friend's advice and slowly losing him in this drowning process by creating fights and causing havoc in our relationship. How much longer will he stand for this? Probably not too much longer, however, I don't want that to happen. He's a great guy and I haven't been happier until interference started kicking in. I don't want to lose him, but something has GOT to give. I sometimes think we need "a break" so that I can regroup and get it together, but can't find myself to do put it out there because I don't want to lose him over bs, but the longer we hang around each other, and I keep hearing voices in my head about what should be happening and it's not, just ignites me to start a fight. SO I ask, what in the living h** should I do?