Neeeeed help

I’ve been talking to a guy on the internet lately and he’s so sweet, caring and attractive and we tried to meet up in 2 weeks but I’m not ready. Not only mentally but I’ve gained a lot of weight due to depression in the last 6 months and I need to lose weight not to look skinnier but to feel more like myself. And I’m absolutely not ready to share that with him. I just need to meet him after 2 months. I know lying is fucking awful but I really need some excuse to delay this meeting for one and a half month. Any ideas? I don’t wanna make him think like I don’t want to meet him