Praying for your romantic relationship is certainly very honorable! I recommend the page that Asteriktos posted. That is a good source for occasional prayers in general.
As you get more serious, even though you say you're still a few years away from any "big ceremonies", it's a good idea to start praying about
those ceremonies and asking our Lord and the saints to guide us towards it. Both in relationships and in singleness, I've found comfort in Ss. Kyril and Maria, the parents of St. Sergius of Rodonezh. Unfortunately, a cursory look through Google doesn't turn up anything for them except their lives, but the Hermitage of the Holy Cross in Wayne, WV puts out a booklet with their life, service and akathist. I highly recommend it if you can get it. You can find it here
. These saints are very beloved in Russia, and are so because they lived both a pious married life and, afterwards, a holy monastic life, making them close to the hearts of both laity and monastics.
the hymns to them are more general too, (i.e., the whole book doesn't read "let me find my spouse, help me get married, etc.") and revolve generally around praying for your salvation and giving you wisdom and guidance...like the things you mentioned above. I hope that's helpful...