Need some Boyfriends advice confused as hell

Reading this story I can see one immediate flaw; you said that you stopped talking to the guy you were with for two years because you didn't want to burden him with your current condition and how you were feeling.
Most people with depression feel that they don't need, or often want the help. No matter what you currently believe, you do deserve the help; you're still a human being, and we all need a little bit of support sometimes. There is NO shame in that.
Firstly, you need to let the second guy know that what happened with the proposal was an impulse, and that it can happen with people who have what's called manic depression - often women say yes to proposals, buy things they don't need (like 20 rolls of aluminium foil or something), or do dangerous things like reckless driving.

You'll need to ask yourself - do you want to be with your ex? If you don't, then you'll need to find someone that will be there for you instead, and if you do want to be with him you need to talk to him more about how you feel with your current condition. This will result in one of two things: either he supports you and helps you through it, which is great, or he doesn't, which means he isn't right for you anyway.
You don't have to do anything that you don't want to. It's your life to live, but remember that other people are here to enrich your experience.
I know I'm only a new user, but I'll be here for you if you need any further support.

Well, it's really unto you but if I was you I wouldn't go for either because if you choose one you might after a while think you made the wrong choice and then maybe you will end up cheating but that is just my opinion but just follow what your heart says and just think what do you think would be better for you.

A big step forward first would be to work on your grammar and punctuation. I could barely understand what you're asking.