I think that butterflies and true passion are different things, although in the beginning of a relationship, they seem like they are the same thing.
Butterflies are more attributed to nervousness and being a little scared and worried when you are getting to know someone. Passion is a much deeper feeling that I can only describe as a mixture of love and sexual attraction/tension (although, the more I think about it, passion is really not about sexual attraction, so much as the fact that sexual attraction usually goes along with passion). But passion is one of those things, like love, that you kind of can’t put your finger on (when you are trying to describe it) but you know you have it or you don’t.
I think a couple can have serious passion between each other without actually having sex (anymore, as in the example of an older couple who can’t have sex for a whole host of reasons) or in the case of a couple where one of the people has been seriously injured. And then there are couples, who can’t be together for whatever reason (they’re married to someone else, they’re separated by distance, they are of different religions or whatever) that have never had sex with each other, but they do have passion. I’m having a heck of a time trying to describe it.
Then there are people who are lucky enough to find what they call their “soul mate.” I think there are a lot of lids that will fit a lot of pots, meaning that most people have a bunch of potential people that could ultimately fill the position as their beloved spouse. But there are a few people (think John and Yoko) who seem to have found someone who kind of trandscends the normal loving relationships that most people find. It usually has something to do with having an unusual amount of common interests that are maybe uncommon in the general population along with slightly unusual ideas about how the world works, and how things are, a mindset if you will.
It’s easier to find attractive people that have common goals and interests with you than it is to find someone who really melds with the same mindset as you do, especially if your mindset is kind of different than the general population or culture around you. And someone that complements your personality, rather than just being compatible with or being similar.
But I think that with most loving couples, the butterflies dissapate when they really get to know each other on a very personal and intimate level. And that does not mean having sex. There are plenty of people (men, mostly I think) that can have sex without ever having any kind of passion or love or intimacy or compassion or even any thought towards the other person at all. So sexual attraction, in and of itself, is not a good determination or predictor of whether two people can fall in love, or stay in love or share passion.
Also, there are plenty of couples that can be in love with each other and share a deeply comitted friendship, who are perfectly content, but would not describe their relationship as passionate. So it kind of depends upon what you think/feel like you need in a relationship (and if you are getting that or experiencing that) to know if you can maintain a happy and fulfiling relationship with someone.
I, for one, could not be truly happy unless there was passion, along with the love and mutual respect and common interests and common goals and deep friendship. But there are plenty of people who have perfectly happy marriages, that do not have passion, but I think that only works out well, if both members of the couple are OK with that. And there are plenty of couple who have passionate, happy marriages without thinking that the other person is their “soul mate.” Because I think most people don’t find a soul mate, they consider themselves lucky to have found a lid that fits their pot.
Then there are couples who have real passion, but do not have any common interests, goals or a common mindset. Those are the most volatile types of relationships, because they are usually not sustainable for any length of time.
You need to sit down with yourself and ask yourself a few questions. What do really want from a relationship? Companionship, warm fuzzy feelings, a true friendship, a satisfying sex life, a feeling of deep connectedness with the other person, a “soul mate” passion, mutual respect, someone to share common interests and life goals, someone who is loyal, someone that you think you can’t live without, a person who would make a good parent to your children? There are all sorts of feelings within ourselves and qualities within our partners that must be there for each of us to have a great relationship but those feelings and qualities and even the amounts of those things are completely different for each person. I hope you can figure out what things you need and then determine whether or not this guy is going to be able to fulfill those needs. Good luck : )