Marrying anyone other than Nepalese comes with it's own set of challenges. But if you both have same political views, follow same religion, attained comparable education levels and career-tracks, have similar tastes, have enough intellectual affinity to discuss on any given topic for hours, can make family from either side to get along, share similar family-values etc and of course love each other,  then your chance of a long and successful marriage is quite promising.

Deciding on whom to marry is not about doing what is ideal or patriotic but rather about what will make you and your partner's lives comfortable and what will not hamper the achievement of the little life-long goals that you have set for yourselves even after the marriage has been consummated.

Good luck to you in the most important decision of your life.