<human>: My boyfriend and I have been together for 2 1/2 years and he is wonderful. Before him, I was in a series of really negative relationships and then I finally found him: he treats me well, loves me more than anything in the world, and works very hard at our relationship. However, I'm feeling myself go through patterns of being really happy and in love and every 6 months or so we go through what we've been calling "rough patches" where I'm really unhappy and thinking of ending the relationship. During these rough patches, no one is doing anything wrong (no one is cheating, being abusive, nothing). I am just suddenly filled with doubt about whether or not he is the right person for me. He has never had these doubts, they all come from me. He tells me that he thinks I am the love of his life and I usually just don't feel that way about him. I'm genuinely not sure that I could possibly do any better than him (not because I have low self esteem but because he is such a wonderful person) but that doesn't mean he is the right one for me.

I guess my question is: is this just what relationships are? Is it normal to have regular periods where you aren't thrilled with the relationship because the honeymoon phase is over? Or does me having these doubts indicate that he isn't the right person for me and I should just end it? I guess I'm also just curious if a part of long-term relationships can be sort of talking yourself back into them, because I know relationships are a lot of work.

Could you distill the essence of the text into 1-3 sentences?
<bot>: There is nothing wrong in my relationship, but I'm not sure if he's the right person for me. How do you know the difference between a relationship ebbing and flowing and one that's just not working?