Getting girlfriend to do things other than weed?

Hey everyone! I'm new to this sub, and I want your guys' help.

So my girlfriend and I smoke weed about once every two weeks (I partake more often, but we are semi-long-distance so we can't see each other too often). Recently, I've been wanting to experiment with psychedelics (shrooms or acid to start) and I would really like to try them with her, but she seems to have negative preconceptions of them. The two times I brought psychedelics up - and I think I usually talk about shrooms specifically - she appears almost aftaid of trying them. How can I convince her? I don't want to make her do anything she doesn't want to do, but I really want her to want to try shrooms. I would also prefer to try them with her (so for me to do them, I'd like her to do them). Any advice on convincing her would be appreciated.

Thanks in advance guys!