<human>: I met this friend some months ago, we basically get together often to play the guitar and to talk a little about what´s going on.

The thing is, I feel pretty beta when responding to him, not that I would do anything for him or that I would do anything he asked me, but I just feel not brave enough to be who I am around him. It sounds weird I know. I´m usually not like this, I do what I want and in my way, most of the times, sometimes I may not feel comfortable or extroverted around some people, or in some situations, but I´m usually not as beta as when I´m with this friend. 

I think these factors may influence that attitude that I automatically assume when he´s near by:

- He has played the guitar for longer than me, so I kinda see him like an instructor;

- He´s really extroverted, I´m not really extroverted;

- Sometimes I find him phony, but I´ve never responded to him according to what I think about him; I mean, sometimes I would like to say he´s being extremely phony.

This may not seem an issue, but it annoys the hell out of me. Some days ago, I threw a party in my house, to which he was not invited, but I found him in the supermarket that day, when stuff for that night. He invited himself, and I kinda enjoyed that, but that night when he was in my house, he started opening beers when It was not the moment yet, he started singing really loud, he kinda took control of the situation. I did not respond to that, has I didn´t have any better idea to what we all could do, but still, it annoyed me a lot.

Can you condense the text into a few key points?
<bot>: I feel really beta around a friend of mine sometimes. It can lead me to do things I don´t want to do, and that is annoying, to know I´m not fully in control of myself around him.