One bit of advice I got when I was young is: "if you both strive to make sure the other is as happy as possible then you're on the right track." and remember.... it takes two to tango. no matter how hard you work at the relationship, if your partner isn't doing a thing to make it work then it's only a matter of time before y'all got to call it quits.
Be nice to your loved one. Show that you care and love her. Make your best effort to always stay in touch with her. Never lose communication. Use compliments and offer to take her out on a date every once and awhile. Proving that you mean well in a relationship is key to keeping the love strong.
be paitent, kind dont insist on your own way dont cling dont feel needy be intrested in them help where you can know when to give space and be content and supportive laugh with them cry with them offer another perspective