That is a 2 sided question really. If you want to be happy and make it last then, you really just need to be you and, be honest. If she/he can't accept you for you then it won't be a happy marriage but, you may be able to make it last. If he/she is the first person you want to share your day with and, you feel like has your back no matter what and, you can be your absolute self then it should be fine. People grow in different ways as they get older so, you really need to know thier core values as these shouldn't change that much as they age. IMO