More is actually the recognition and significance of their love, and more is what is the attitude of the two people towards this matter.
Don't worry about the problems that the subject is worried about. Just send an invitation according to the normal process. Whether you come or not is their business. I believe that if the people you invite still think you are friends, they will come naturally, even if they are not here, I believe they will be very polite. If you are really worried that few people will come, you can explain the situation to the woman first to avoid embarrassment.
Besides, getting married is a matter for two people. Not only your relatives and friends were invited, but also the woman was invited. Maybe not many people will come from your relatives and friends, but it doesn't mean that the woman is in the same situation as you.
One more thing, I hope I invite you to do it, and you agree to do it. Don't worry about the rest, some things can't be decided by you alone. People should act according to their destiny, and doing things is more of a person's attitude. Whether they succeed or not, they should try first. If they are worried or have concerns, they can try to communicate with each other to solve them.
Finally, I wish you success.