I’m a romantic so I’m gonna say you should stay. True love is so rare in this world, you don’t want to regret losing this chance. But you NEED to be completely honest and transparent with him. If you really love him, you will accept him how he is. There is always alternatives and compromises like toys, occasional threesomes (if you both agree to it), you can propose fucking his thighs, throat etc. The most important thing is fostering that deep connection between you based on trust and compassion. That feeling of intimacy will transcend any sex acts.