How do I talk to a girl when they are with someone?
If I am by myself and dont have a wingman or support, how do I talk to a girl when she is with a guy or someone? I am worried that guy will be an overprotective asswipe and wont let me talk to her. Usually its hard to find a girl who are by themselves to talk to (I dont mean hit on and flirt with) but just have a friendly conversation with and make friends with. I feel funny being silent also and I hate being by myself being boring so my question is if I see an interesting girl who is by herself at the time and then later, her friend/bf guy friend shows up!, then I am screwed. Its like I am put on the spot.


You need to learn small group interaction and communication.
If you are talking with a girl and someone she knows joins the two of you, you are only put on the spot if you try to hog the spot light. There is no such thing as an interesting girl, these are only girls that you are interested in. If you are not hit on and flirt with her, your behavior should not have to change just because others join you. You can still learn about her and share at least something with her with others around.
It is only if and when you both find common interests to share with each other that you might want to set up a time and place to talk with her without the distractions.
If she is alone or with one other person, always ask before you join in.
Common politeness tends to dictate that if a couple is alone, do not join them unless asked. If others assume that they have the right to barge in on your conversation, they may want information or assume that at least one of you will welcome them.
If the conversation takes a weird twist, you can always leave and comment to the girl of interest that perhaps you can continue another time.