I am a very apathetic person and although I am trying to change that it is a core part of my personality that I cannot change, I do not feel the need or care to love or be loved, it actually confuses me that people care about "being loved" or "wanting to love something" and I usually dismiss it as something weird even though I would be the minority I guess.
I don't know if you need to have feelings to have a successful marriage although I have never been married so I wouldn't know
You said yourself those wanting to love and be loved are the majority so most likely you'll marry someone who desires a loving partner. Not being able to fulfil that will no doubt cause problems in your marriage.