I do think that attending a University would be a good experience, and it will allow you many opportunities to meet new people.
It does seem challenging to have social anxiety and be attending classes and being around people who you have not met before, but now you have a fallback with the therapy series that you can rely on even if socializing and being around people seems too difficult. I would recommend not dropping out even when things seem to challenging, as there were many times in my life looking back that I wish I would have not given up on (and I had the therapy and had made a lot of progress with it). The thing is, you might actually surprise yourself, and find that you're able to fit in really well at the University and make a lot of friends and make a lot of progress over social anxiety.
Once thing I did notice from your post too is that you seem to be trying a bit too hard (when you said trying my hardest), which is implying that you're putting a lot of pressure on yourself to get over social anxiety. With overcoming social anxiety, the key is the paradox; the less we try and struggle against it, the better off we are and the more likely we are at succeeding. So, if this is the case, take the pressure off yourself and using your calming strategies from the therapy series whenever you can...but again, without pressuring yourself. When you pressure yourself and try and struggle, you're actually working against yourself.
Hopefully all that helps.