Oh I am so sorry to hear this. I don't know if this is a comfort, but you are not exhibiting any odd or rare behaviors--many people who start seeing someone whom they consider a special other often end up "ignoring" friends and family. It's not that you or they intend to at all. Life is crazy with school and/or work and then a new relationship that you invest time and energy in, and that leaves little other time for anything else. Most friends and family understand to a point, but the best thing to do is reach out to them now.
If you are able to with finances, maybe you could take these friends and family members out one by one to lunch or coffee. Or if money is an issue, invite them to a dinner you cook or dessert or anything like that just to show them that you are making the extra effort to restore your relationship. I think you'd be surprised at how many of them would be touched and would be forgiving. You will feel really good about yourself that you are doing something nice for them. It's a positive cycle! We read and hear so much about negative cycles, like the abuse cycle, the poverty cycle, etc. Yet unfortunately society does not focus on the positive cycles, but they do exist. Research shows this, and I think even more than research studies, common sense shows that if you go out of your way to be nice to someone you care about, they will tend to appreciate and reciprocate. And again, I think you will feel better overall about life in general. Just like negativity breeds negativity, well, positiveness breeds positiveness! :-)
While I do not know of any research studies that support this (and by the way, let me know if you want me to send you any research references from my statements above), I do personally believe that good people with whom we can connect with come around usually when we are not "looking for it." Think about this--often times people, and women more than men, probably because of the inner pressures and "biological ticking clock"--go around LOOKING for this mental list of qualities that they think their future partner has. And while it's good to have standards of course, sometimes we miss what is right in front of us. Does that make sense?
There are lots of lists I can share with you if you want to continue chatting. For instance, I can tell you want kinds of relationships are reported with highest levels of satisfaction, what different attraction levels there are (other than the obvious--physical), etc. But to close this out for now since this is already turning into a book [smile], try to focus on your friends and family and school/work/whatever you are doing full-time right now. Also, and so many people do this, do NOT FORGET ABOUT YOURSELF. Take time for yourself. The older I get, and with three children and a partner, I often neglect "me time." But I definitely try each day for half an hour or even 15-20 minutes to meditate, do yoga, and just sort of sort things out in my mind for the day. I believe in healthy living such as exercise and eating good, whole foods. I definitely can send you studies that show a definite correlation between being healthy physically and the positive impact that that can make on your mental and emotional well-being.
Also and lastly, expand your horizons in that there are usually really good people going to local functions like art galleries, musical performances, even high school theatrical performances. There are church functions (if you are religious) that you can attend like suppers or things like that where you don't have to be a member at all, and your money is usually going to a good cause, like helping people in less fortunate countries or even here at home. There are lots of ways to meet really good people. I actually have a list too that I can send you that I researched a year ago for another customer.
I hope this is a good start. Please don't give up. There are wonderful opportunities out there probably in front of your eyes that you might just not be seeing. :-)