Hello, and no I'm afraid there isn't a way to delete posts- the 'delete' button goes away after just a very few minutes, as well as the edit button- otherwise folks would make hash of the forums- I mean, we're a mental health forum, after all and that would just break things terribly, in so many ways. And the moderators don't delete posts (as seen in several mods' signature lines).
So your best bet would be to deactivate this account. We strongly discourage serial account hopping (it has been known to get folks banned), but if a person deactivates and reactivates under a new account as a one-off occurrence, the mods aren't going to say anything about it. But that's only if you're set on sharing your presence here.
On general principles I would in any event advise against sharing account info with anyone. The wording of the forum rules doesn't explicitly say address this, but it does butt up against it as part of an overarching principle of forum anonymity:
Sharing private information, about you or any other person, that makes you or anybody else recognizable is not permitted on the forums and will be removed immediately if brought to our attention.
But of course we can't control what you do outside of PF!
Once you break your anonymity on PF to a person you know outside of PF, it opens up sorts of possible outcomes that could happen out of your control and, as noted above, we don't delete posts. After the part I quoted, the rules go on to state that if after having been advised against being personally identifiable, someone does it anyway, that's on them.
I know I would certainly never let someone else know I had an account here, unless they were my therapist and I was desperate enough to open up to them completely, ha. Even then I'd think long and hard about it. And probably not do it unless I was at my wit's end.