Qualified or not
To say nothing isn't the best way to handle every situation between myself and my current girlfriend. I tend to stay silent because of fear. I'm afraid I'll set her off even more than she already is and I'm also afraid I'll say something that'll hurt her feelings and can't be taken back. Im not qualified to say it's the best decision but if I could give you some advice it would be to not take any advice from me on relationships.
Don't internalize everything
Take it from me. I may not be qualified to give relationship advice but I can sure tell you what not to do. Don't keep everything in. It will come back to haunt you. Relationships come with raw emotion which when pent up can do damage. If you're having relationship problems and you can't afford a therapist then seek out a volunteer or someone who is neutral to the relationship to help mediate issues between you and your partner. Most of the time both of you believe your right and won't budge. This leads to arguments and hurt feelings and damage to the relationship.