" only mention it because it's something that I do not imagine would characterise a same sex relationship."
Except I feel very protected by my wife, but I also feel very protective of her. So, a mutual protectiveness! Which sounds better to me. After all, unless you really want to go down the road of thinking that men are stronger than women, hence their natural position is that of protector/defender (a line that many men seem to feel is their role)........
"He just has a totally different energy about him and it is a male energy so this makes me more aware and in touch with my own female energy. " Sorry, not trying to be offensive, but this just sounds like meaningless, pseudo-magical nonsense to me. YES, males and females are indoctrinated to be very different in our current society, which has a lot invested in the different but equal, natural and complementary, yin-and yang supposed explanation for heterosexuality. But I don't see that as anything to celebrate.
Also, you seem to assume that lesbians are somehow, by being female, going to be 'the same' in some sort of essential and stifling way. Most lesbians I know don't fit into conventional notions of femininity, don't act the way females are supposed to. Nor do they fall into into some butch-femme aping of heterosexuality. Even if you do believe in some sort of balancing of traits in a successful pairing, doesn't mean that that can't be two females. The problem isn't that you're both females, the problem is if you expect one has to be male/masculine, and the other has to be female/feminine. I think that given a chance, females can have as wide a range or personality traits as any other human being -- just that if you insist on squashing all females into the feminine box, suddenly you have a void that needs filling.
Actually, I'm really quite insulted and annoyed by this old idea that females together don't fit, either sexually or emotionally, as friends or lovers, that it is somehow stifling! That some sort of magical maleness is needed to stop a disaster.
"the part of male/female psychology where these instincts reside" AH, there's yer problem, assuming that these 'important' differences are natural and innate...................