What happens to grad students who are disliked by all other grad students in their labs?
For background on the situation:
I started my phd recently, and I'm in a lab with three other grad students, a post doc, a tech, a computational analyst, and the PI. For the first three months, the three other grad students and I were incredibly close. It felt like working with best friends.
Then, my PI offered me a chance to attend a conference, and I said yes. The other students, upon finding out, got livid and won't speak to me. This has been going on for three weeks. I've asked if we can talk about it, I've asked if they feel like I did something underhanded (I can't think of anything), but they either ignore me entirely or don't respond. I feel horrible (I also have a childhood history of being gaslit, so while I don't think I've done anything wrong and confirmed that with my PI, it's hard for me to not feel guilty).
I've spoken with my PI about it because it is affecting my ability to find reagents and protocols (given that I'm the newest member of the lab), and he thinks it will change over time, but it has been three weeks and I'm still having to search through all the boxes myself to find everyday reagents.
If I need to switch labs, it's going to be easier to do it now than at any other time, but I don't have a replacement already set, and I'll lose a training grant I was accepted for.
My specific questions:
1) Does being a black sheep in the lab mean that I should try to switch labs? If I stay, how do I make sure I get the things I need?
2) Is this going to ruin my professional life? What are the consequences of having my labmates hate me enough to act like I don't exist, and how can I counteract this situation?
3) This one is more interpersonal, so please ignore if not appropriate for this forum. If this situation is my fault, how do I learn the skills to avoid doing this again?