Thank you for asking. You must understand that even if tadalafil helps you in sustaining erections, an arousal is required for having erections at first place. If you are facing issues with getting arousal, tadalafil may not help you. Stress, anxiety are two most important risk factors for psychological Erectile dysfunction. A detailed information regarding these is needed.
Next Steps
I would suggest you to consult with a sexologist for further management. For more information you may consult with me directly here on practo.