Heresy

I believe in God the Father, and in Jesus Christ, His only Son, our Lord. I believe in the Holy Spirit. But I don't think the theological construct of the Holy Trinity is directly attributed to in scripture; it's more a theo-philosophical contraction probably created to arm the illiterate from the serious threat of gnosticism or other heretical beliefs that Jesus was either not God's son, or was not really human?-- a mystical vapour or something?
My biggest struggle with swallowing the idea of the Trinity, as postulated by systematic theologians in my conservative circles, is I keep choking on what the Bible reads. I have been trained to say that God is 3 in 1, like a shamrock, or the Presbyterian fish-overlapping-ring thingy... kinda like a sanctified Venn Diagram. That Jesus is equal to the Father who is equal to the Spirit who is equal to Jesus, which is fine for a mantra, but I'm not seeing that directly stated in scripture. That point was cinched when I was asked to memorize a "proof text" in theology class as evidence of it, yet the scripture only mentions the Father, the Son, and the Holy Spirit; the synthesis is parabiblical.
To complicate things, I believe that God is Spirit, and that God is Holy... you could say that God is Holy Spirit. And I believe that this God is like a Father to us even today, opening wide His arms of love to adopt those who would repent (not wanting anyone to perish); a father TO whom Jesus, His only true son, submitted and prayed, "Not my will be done but Yours."
I believe that Jesus was born of the virgin Mary, that he grew in stature and wisdom, and that he not only taught the way (prophet/teacher), but he provided the way (priest/sacrificial Lamb). Jesus was the man through whom the Holy Spirit entered our tactile, prehensile world. God walked among us in Jesus' footsteps, sinless, yet was differentiated enough from the Father that prayer with the Father was an earnest part of his daily life... even Jesus had to set aside time to be with God the Father... so how does that fit in boxed-in theology cubes?
Are there only 3 facets to reflect God to us? Why not 4 or 5... Creator, Ruler, etc...
So if you ask me, do I believe in the Trinity, let me simply reply, "Probably; what are YOU talking about?"