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As a general rule of thumb, when you're feeling that you're an emotional wreck and overly stressed, it's probably not the best time to enter into a new romantic relationship. It's always possible you're unconsciously seeking to be rescued or perhaps to escape/avoid whatever your current difficulties are. Neither mindset is the best for co-creating a healthy, loving and respectful relationship with another human being.

As I understand it, you are currently in a relationship, albeit, one that may be on it's last legs. Likewise, it's nearly always best to end one relationship, recover as necessary, re-center, re-stabilize and then consider if you're ready to move on to another one. It's not only the kindest route for yourself, it's often the kindest route for those you may be involved with as well.