Your expression is certainly informal but very natural in spoken American English.
It adds emphasis.
I am so hoping to get that job. (I very much hope to get that job)
She is so wanting to make that trip to Europe. (She very much wants to make that trip...)
Your next statement is not good English and the meaning is unclear. For example, if you proposed meeting with your friends and they were unable, the better way to put your statement would be
“I was so wanting to see you before I graduate.” Or
“I was so hoping to see you before I graduate.”