He is a rare kind.
You will always have fun with him, and he will never judge you. Being with him will feel like the safest and most accepting place on the planet.
Always keep in mind that he is a people-pleaser, and please make sure that no one takes advantage of that. Trying to protect him from that will annoy him to no end, but do not let that stop you. You will feel forgotten a lot because of this, but love him despite of that.
Always tell him how much you appreciate him.
Write him a letter.
Never turn down an adventure with him.
Most importantly, try not to get too jealous.
When he is cold call him out on it. You do not deserve to be treated that way. Always let him know exactly what is going through your head because he is extremely naive sometimes.
Absolutely do not let him treat you like you are only a convenience. You should be treated like you are everything good in not only his life, but any man who loves you.
Remember that no one will love you like he does, and that is perfectly okay. If things do not work out, another man can give you a special love that this one could not.
Do not let him become your home, and do not get attached too easily, You never know when he is going to ghost you.
But, take the time that you do have to look into those eyes, and memorize that gaze. Remember how it feels to actually connect with another soul. He has a bit of a gypsy heart so it might not last long.
Finally, remind yourself that you have someone special. But also remember, in the words of the great Christina Yang,
"He's not the sun, you are."