<human>: Can you summarize the given text in a few sentences?

My wife and I have been together for about 7 years.  Half that time we were dating, the other half living together or married.  

I decided to marry her because I know it's what she wanted.  I felt like I owed it to her for sticking by me all these years (she's supported me emotionally through a lot, and she's done SO much in helping me control some problems with alcohol). But I'm not sure I've ever really LOVED her.  

At times I've viewed it from another, similar perspective… I married her because she's taken care of me and deserves to be taken care *of*,... and I don't want to "keep looking" (and suffer all the heartache in the process).  I'm not sure I want to be *with* her, but I sure as hell don't want to be single, nor do I want to break her heart. 

We get along very well and keep things civil, but I don't really think she and I have much in common.  We have very few common interests, and different personalities.  She seems very goal/career oriented, while I've always found contentment in whatever blue-collar job I happened to have at the time.

Ever since very early in our relationship, I've never felt totally satisfied being with her.  Maybe it's not fair to her to keep things going if my heart's not 100% into it, but then I know it would break her heart if we split up.  Anyway, I'm not even sure if *I want* to split up.  

If anyone has ever been in a similar situation, and has any advice, or has any books to recommend, I would appreciate it very much.
<bot>: I think my relationship is "good enough" (barely), but is that *good enough*?  Any books out there relevant to my situation?