<human>: Hey guys,

I'm 4 years into my second serious relationship with a girl and find myself fighting with the issue of "what if".  I love the person I'm with, but still have moments of weakness where I feel like I'm missing out on the opportunity to meet new, interesting people, who I hypothetically imagine a relationship with, both emotional and physical.  I felt this in my first relationship and it may or may have not been the reason we split.  I honestly don't know if that was the deciding factor.

I just cross paths with people fairly regularly, where the question of "I wonder what a life with them would be like" comes up.  I don't know if this type of thing is normal.  Is this an automatic sign that I shouldn't be with my current partner, or is it just a thought that happens, that you deal with, with logic and reason?  I don't know how that really works.  I know I'm young and lacking long term life experience, but I've felt this with both my long term partners and short term ones in between.  I feel like I'll never be satisfied.  Like the allure of the chase will ever end.

I've read about polyamory before and wonder if I fall into that bunch.  Thus far in my life, it feels like that might be where I stand.  

I guess my main question is: When you find "the one", does the attraction, or interest in other humans just not exist, or is it something you process and learn to brush off?

I hope I made this post properly.  Thanks for all your feedback in advance.

Can you give me the gist of the text in a nutshell?
<bot>: How do you deal with physical and emotional attraction to other people, when you're in a long term relationship/marriage?