I (24f) met a guy online. We've been talking everyday & in a relationship for a couple of years. Finally decided to meet, and he confesses to being older. He's making me feel guilty.

This is a super messed up situation, I know. And it's my fault, I know. But now I need advice putting those two things aside.
I met this guy online and we've literally talked daily since, and have been in a relationship. He's absolutely amazing. We've talked on the phone, and he's sent me pictures, I've sent him pictures ect. I thought it was perfect for my first relationship.
Well, we decided to meet next Saturday. I've spent all of two weeks freaking out, trying to do a quick diet, look nice, ect ect.
He told me tonight he needed to confess something. He told me he's not who I've seen pictures of, he isn't 26. He's 46. I'm devastated.
I feel like I've known this guy all my life. He's all I've got. I have no family, no friends, nothing. So the plan was to finally meet, and then me go and live with him in the near future after we'd spent real life time together.
I freaked out. Super bad. And now he's making me feel guilty. And he keeps saying he's given up everything for me, I should give him a chance, we know everything about each other, we are in love, we can look past this ect.
And he's saying he's still coming to my city and is hoping by then I decide to meet up anyway. He said he's going to take me out to a fancy place as an apology and just wants the chance to prove himself.
What do I do? My whole world is shaken rn. I've invested so much of my life into this guy and don't know if I should just let it all go or give him a chance??
Tl;dr; met a guy online and have talked daily and been in a relationship. Time came to meet and he says that's not him in his pics and he's 46 not 26. Begging me to still meet him and give him a chance. What do I do?


Source.