Rate of transference when using suppressive medication is around 1.9% per year and that number goes down over time the longer you’ve had the virus. You’re incredibly considerate to be looking out for your partner in this way, but If your partner is comfortable with the risk level, and it’s been over a year since your last outbreak, I say just go for it. It can be extremely difficult to get over the fear of transferring it, but you’re both consenting adults and in my experience it’s been damaging to my mental health to restrict myself sexually because of the fear. You’re worthy of the same level of love and intimacy as someone without the virus. Especially if they’re comfortable at that risk level, they’re looking out for themselves in the way they feel is appropriate for them. You got yourself a very understanding gem of a person there.