And to answer your question about what a healthy relationship is to me....
When I say relationship, I base this on any relationship, not just a romantic or intimate relationship.
In my opinion......
A healthy relationship isn't all about super duper compatability 100% and being like cookie cutter images inside and out of another person.
Healthy relationships need to consist of both parties accepting one another as they are, even if some things are different.
Healthy relationships need to consist of both people being able to listen to one another , but HEAR what the other is really saying.
Healthy relationships consist of striving to see the other's point of view but having enough maturity to accept the points of view may be different, and the assertiveness to work with the other to compromise or problem solve if the differences are somewhat of an issue.
A healthy relationship is doing something for the other, just because you wanted to do something because you care about that person, and not expect anything in return. No hidden agendas.
Honestly in my opinion as long as their is good communication between two people, and that the other person's opinion and feelings matter to the other (IN A HEALTHY NON CO DEPENDENT WAY)...and that two people have the tools and skills to navigate issues that arise and communicate it to one another, that's the basis for any good relationship.
If you have that and stay true to it, I can't see anything but positive things growing from that basis.
Can you accept that the other party does not or will not see your point of view? That maybe they really don't care and don't want to hear it? That maybe they have digressed to a place where they could care less what you think?