I have the opposite problem of a guy with a melody problem, because I can write melodies, but can't write lyrics
i think what you should do is open up a blank text file and start blowing your brains out. do this daily, forever. it will help. then the other thing to also do is start making songs with words and have competitions with yourself to see how bad you can make it. this will lead to good things i promise. the reason for this is that all music is bad, that's the reason we all like it so much