M(36) is seeking advice on how to discuss ways to enhance the intimacy in his relationship with his girlfriend(43).

I've been in a wonderful relationship with an incredible older woman for over a year. We met on a dating app, and things escalated quickly. At first, our chemistry was intense and full of adventure—we even attended a sex party together, which she surprised me with, and it was an amazing experience. However, as our relationship has progressed, some of the excitement and exploration in our intimate life seems to have diminished. Lately, I've been feeling a bit restless. I adore her and don’t have any intentions of cheating, but I'm quite sexual and have a strong desire to explore new things together. I’ve been considering suggesting threesomes (both MFF and MMF, if she’s open to it), attending another sex party, or simply using the toys and games I purchased months ago that we haven’t yet tried. There are also smaller things, like experimenting with different positions or rekindling the experience of finishing in her mouth, which I truly miss. We’ve explored anal a few times in the past, but it's been a while now. She knows how much I enjoy it and has expressed her interest as well, but I wish she would initiate it more or show that she desires it often. We discussed our fantasies when we first connected, so she’s aware of my preferences, and I would also love to help her explore her own fantasies or try new things that she may want from me, but finding the right moment to bring it up has been challenging. The main issue is figuring out how to approach this topic without making her feel like I'm dissatisfied or putting pressure on her. I want to frame the conversation in a way that highlights our growth together and the desire to keep the excitement alive rather than suggesting that I'm unhappy. How can I start this conversation? What can I do to ensure she feels comfortable and understands that I love and value her, regardless of how our intimacy evolves? Any advice would be greatly appreciated.