Here is my go, but your english sentence doesn't make sense and I'm not sure at all about tada hitori no mono. Or what to use for germ here, I figured you weren't talking about germs or anything so I didn't translate it.
私の心はただ一人のものだが もうそれをジェルムに溺 れさせたい。
watashi no kokoro wa tada hitori no mono da ga mou sore wo jerumu ni oboresasetai.