I wish most people had such amazing self-awareness and are as honest as you :-) It's such a wonderful way to be.

Am sorry that your friendship is taking a break, but just by all you've written, I think when you do get back in touch, your friendship will be different - and probably better because you're so honest with yourself and will probably try to make the changes needed when you can. For that reason too, I don't think you'll be toxic with any new friendships either.

Really pleased too that you're pushing ahead with making new friends despite how you're feeling. Kudos where its due. Have you tried any uni clubs? I know when I was at uni there were clubs or extra classes we could take (classes just for the fun of it that are just a few weeks long like a photography class etc) Perhaps you could meet more people who like the same things as you there. Will you be going home for the summer holidays? Maybe a recharge may help pick you up too.

Hugs