Too much invested in a show

I just finished Showtime's Dexter.  I have never been so invested in a show. I love my shows,  especially The Walkin Dead but damn.
I about went nuts with the season 4 finalie and Nextflix not having seasons 5-8 till January 1st. I could not concentrate on my other favorite shows. Gaaaah. All I could think was poor Dexter. How is Dexter going to handle this? Is Harrison going to be born in blood?
I loved watching him discover he was human and can have feelings and love and a life. The finale was a bit disappointing. Especially to see Deb die. I had hopes for her. She was a good person. I cried when Dexter turned her machine off. He showed he is human and can love her and not be selfish. Although why did he dumb her in the ocean? That's where he puta bad guys. And why did he try to kill himself? He was doing good. Finally seeing he is human. Did Debra dying really make him feel so guilty to leave his son and the woman he loves?
I hope in my head he reunites with them. And soon.  Also... is it assumed Harrison died at sea with Dexter?