Honestly, if you're that hung up on if you're real or not well-... I don't know what to tell you. Look at it this way roughly 107,602,707,791 people have been born into this world. Not a single one made it very far, a few of them did very important things in life things to be remembered for then again most of them did nothing but survive for some time then die. We live, then we die everything else is just a means to an end. Just things, things that don't matter much. Honestly most aren't remembered, and being remembered is pointless as eventually everyone ends at the same place. Laying awake at night, hoping, wondering, and praying that you exist is-... well pointless in my opinion. Does it really matter if you exist? What if you're simply a computer simulation or a thought in some higher being's imagination, will it devalue what you've done, the things you've said or the world around you?
The fact that you can think, or feel isn't enough o_o you want someone to tell you that because you think and feel you exist. Simply having a consciousnesses should confirm that for you. Do you really need me or anyone else to tell you, you exist cause you'll get so many mixed answers from people who like me just feel like ranting about nothing
Any idea exists. It's a real thing inside your mind. Just like love, anger and hate exist all of them are things that have no definite, shape form or area but are there.