Totally understand how you feel. I now lift pretty much alone, even though there are plenty of people around. I just can't usually train at the limited times when there is someone I trust to spot me (and I would just like someone there, relatively close "just in case".) This squat progression has been tough because of that. I can't decide yet if it is good for me to just tough it out, or if I should make more of an effort to train with someone else.