1) I'm thinking (of going or about going) skateboarding in Ischgl-Samnaun, Austria on Friday, Oct 11.
I'd like to, but I need to reflect on (think about) some stuff. (Reflect is deep thinking. It could be the right word though).
2) Would you like to come with me to the party on Saturday night? I'd like to, (but I’m not sociably comfortable) I'm not psychologically comfortable to attend (attending) parties.
When people talk about “psychologically”, it’s oftentimes associated with or assumed to be a mental disorder and has a negative connotation.