How much more stressful is college on a non-traditional student, and what are some good ways to deal with college stress at 30?

I've had a "lisp" my entire life and was never too worried about it. But recently I'm worried that it may be affecting my social life and career. In turn this has been very traumatic to my self-esteem. I'd like to get help and was wondering what the best ways to solve this problem are, and if I have to get surgery to fix this "problem" how much would it cost me?

I interned somewhere this summer, and I think one of my co-workers has developed a crush on me. Now I'm back at school. He will still text or call every week even though he knows that I have a boyfriend. At first, I enjoyed our conversations, but I'm starting to feel very uneasy about what's going on. I have to admit, I may not be the innocent one either because I try to make pleasant conversation with him, and I really do like talking to him. I don't want to lead him on anymore, but at the same time, I don't want to make him mad because I've accepted a position at the company and I will be working with him again. HELP!

I have been having very disturbing dreams about a past relationship which ended over three years ago. These dreams affect my moods during the day and give me a depressed feeling. I am currently on an anti-depressant and in therapy which have helped with this situation, but the dreams are lingering and creating more anxiety for me. Any suggestions?