I don’t know what to do

My girlfriend and I have been together for around 6 months now and because our relationship has gone well, we’re generally starting to talk about what we’d both like for the future. I care about her so much and I wouldn’t want to loose her but I’m concerned about our future sex life. Shes MtF trans so I obviously respect her wishes with what she is and is not comfortable with. But after she is at a point where she is comfortable with herself and her body, I have no idea what’s going to happen. Sex is something that I value a lot and I have a very strong desire for that level of intimacy and closeness but I don’t know if that’s ever something I’ll get with her. I’m so lost, I care about her so much and she’s someone I would seriously consider being with long term. But I have no idea how to reconcile that with my value of intimacy and how important that is to me. I don’t want to end our relationship. I feel like such an asshole even thinking about it.

Any advice?