"I'm interested in talking about where our relationship is going. I am interested in pursuing more with you. Is this a good time to talk?"
"I really enjoy my time with you. I think it's important to reassess a relationship when there's been a significant change that *may* affect it. I was hoping we could schedule some time to talk about our relationship and some possible changes going forward?"
"I love you. I appreciate our time together. I would be interested in increasing that time. Is this something you would be interested in?"
"I'm interested in being an option as a primary partner if you are interested in having a new primary partner. Is that something you would be interested in?"
"Love As Thou Wilt"