Sex standing up advice!!

So my bf and I have recently been trying to have sex standing up, either against the wall of the bedroom or the shower.

I know he can lift me because he’s done it before, but I’m too insecure about my weight to have him lift me for me than a few seconds. I’m neither over weight no under, pretty average I’d say, but still filled with insecurity.

We have a lot of sex and 99% of the time it’s in bed, we both want to explore and try new things, but my insecurity really gets to me and I have to stop him in the middle of the act when we attempt the walk sex.

So does anyone have any tips or similar experiences for dealing with this kind if insecurity? Anyone have any tips for wall sex? Anyone have any not too risqué or crazy but more adventurous

sex positions?

Any advice/ tips / stories are welcome! x