If the person who is trying to ruin your relationship is a normie and you are meditating daily, i don't really see that he would be stronger than you to be able to mess with you and have success. But you can do something about it, you ca do a protection magic, use/vibrate the rune Algiz a multiple of 15 like 30, 45... (don't do many vibrations if you're a beginner) while vibrating it vizualize it on both of you and afirm 9 times. Affirmation: The energy of algiz is now protecting my love relationship with [name of loved one] and it is always keeping it safe of any and all negative energy and curses from others.
Start it when the moon is waxing, on sundays in the hour of the sun. Use ChronosXP for the planetary hours. Do 40 days or more if you have experience, like 80, 90. Use the SS calendar from jos-astro.com
For the rune vibration
Or you can do just affirmation (but this way is weaker). My love relationship with [ his/her name] is always completely protected and safe now and always. Afirm it 40 times before sleep or and after sleep. Or less repetitions like 18, 27 if you don't want to use too much of your bioelectricity. Same as above for starting time, duration can be limitless.
If he/she who tries to ruin your relationship is an SS tell this to Satan he will deal with this.