I'm noticing that it just feels impossible for me to get even a 20 second conversation out of the hot young girls (like 18-21), PARICULARLY when they are in groups.

In bars and stuff. Usually they're seated but not always.

If I open in a more high energy way, maybe self amusing or whatever, I feel as though they think i'm crazy, and they just eye code each other, and maybe answers any questions I ask them with one-word answers whilst still kind of eye-coding their friend as if to say ''what do we do?''

Or i'll try to tone it down with the next group and just open in the same way every other guys does, and just ask the usual questions, but they just seem bored and give off bad vibes/body language and want me to go away so that they can speak to their friends.

I don't tend to have this issue with women my own age, in general. Particularly when by themselves

I'M wondering if maybe groups of young girls are just not something that has a remotely good chance of working since they don't really want to be interrupted from speaking with their friends and one should always wait for girls who are by themselves (or maybe 2 girls if you have a wingman)