Good to hear you're doing so well. It's very hard to get over probably the most emotional and tense relationship we'll ever experience but once you do, then nothing will ever seem as bad.
After my own BPD experience I was able to date and, if I even suspected anything remotely BPD about a new romance I would end it but not have any hurt or worry like with the first BPD relationship. Never get back on that treadmill again

Yes, it can put you on your guard but I always give people a fair chance and we should always remember that there's more nice ones than bad ones out there.
Most important lesson to learn is.. 'when the many red flags appear. act on them' and don't ignore them like we did first time round, hoping things would get better.
Best wishes - keep getting out there with a healthy, positive attitude as I find good things happen when you least expect them