If you confessed every sin to the best of your knowledge and were absolved, Jesus truly forgave your sins, all of them.
It is interesting, though, that you have learned something more about confession. While confession was valid since you did not know about the requirement, and since it was Christ, and not the priest, who said
ego te absolvo, I would say those confessions were valid.
However, it is truly a simple and nice thing to do if the next time you confess, you mention this to your confessor. He will tell you what to do.
I think it will greatly benefit you if before confession (perhaps the night before) you do an examination of conscience. There are nice ones with questions that will help you find out exactly how you may have sinned (I personally use “How to make an examination of conscience” by the Redemptorists). While such an in-depth examination of conscience may be limited to the time before confession, a quick daily one, possibly before going to bed, is a wonderfully edifying thing.
Love is the most wonderful thing there is. The Holy Spirit is pure Love, Love itself, so powerful and infinite to become a Divine Person equal to the Father and the Son. However, we ought to be strong and discern between what we do out of true love and what we do out of the pleasure of the senses. Lust, after all, sounds like a terrible word when referring to something we did apparently out of love. While I exhort you to find out a bit about the “theology of the body”, I remind you - to help you in discerning this and related things - of the words of the Lord:
anyone who even looks at a woman to desire her has already committed adultery with her in his heart
These words, of course, apply to the ladies as well.