Complete Confuzzlement

Hello all, after lurking around the forums I figured it was time to actually ask for some advice/help, so here goes:<p>

I've loooong identified as bisexual (though without ever really saying it), though it's generally expressed itself as "straight in bed, gay in the head" - I've dated guys (and currently am) but find my thoughts about 'what's hot' (so to speak) tend to be women. More and more over the past year or so I find myself getting all giddy/blushing when a cute girl checks me out, and get nothing when the same happens with guys.<p>

My dreams have been heavily featuring girls lately; one that stood out last week was - bear with me here - one in which I went on a date with Gerard Butler (I have NO idea why it was him) and hung out in a friendly way, but was then like, "Gerard, I'm actually gay" and I then found myself with this super awesome woman (I'll leave out the rest, which featured having Christmas at Versace's house and meeting Michael Jackson...!!). When I woke up I felt a strange mix of realisation and total confusion. <p>

My last two relationships (i.e. with men) have fizzled and I could honestly say if I didn't have to have heteronormative (ha!) sex ever again, it wouldn't bother me. I'm currently in a relationship with a guy but it's obviously cooling - we've both discussed just shifting into friends/housemates gear - and, funnily enough, a few weeks back he semi-joked that he thought I was a lesbian, and I sort of thought "hmm" instead of laughing or joking back. <p>

It feels so weird to get to 27 and be "confused about my sexuality", but here I am.<p>

Any thoughts/advice/wisdom?