Read More About Actions speak louder and truer. Believing someones actions above their words will protect you from the wrong people if you pay attention, don't ignore, excuse or rationalize away the duality and fol.
Just because you aren't given the credit and haven't been recognised for your work doesn't mean you have to give up or stop. You don't always need credit, other people do not always have to know what you are capable of doing as long as you do.
When people make you feel unwanted, don't leave to make them feel sad or guilty, they won't. Leave because you no longer have a reason to stay. Sometimes you have to be strong for yourself. What's meant to be will end up good and what's not - won't.