Interesting question.

Writing as a long time vegan who has enjoyed every day of a 34 year marriage to an omnivore wife, the answer is unequivocally YES!

More, I am the only vegan in our immediate and extended family. As I think about it, I am the only vegan that I know :-).

I am of the mind that we each make the choices that we feel best support our personal goals and commitments. It is of no interest to me to compare the value of my goals to those of others, thus, unless I am asked about veganism, it is not a an element of consideration in any of my relationships.

Additionally, I can confirm that having lived 56 years , I have something to learn from everyone. If I limit my relationships only to those who are most like me, I am likely to miss out on many interesting and valuable conversations and lessons.

All that being said, the larger challenge in a relationship may arise from being involved with someone who does not share your overarching philosophy of self-examination and self-discipline. The similarities of commitments may be of lesser impact than inequality between finding value in commitment. It may well be that you can love and enjoy sharing life with an omnivore whose choices arises from reasoned consideration, but the same may not be true of someone has refuses to apply reasoned consideration to their life choices.

Bottomline - why each who falls in love with another who, in the end, is a mystery. Open mindedness in the adventure may mean a greater variety of experiences.