Not very specific this question which is great because then I can waffle on about all my love advice! Brilliant! Lets start...
The main piece of advice I'd give is to never be afraid of taking risks! Risks in love may be fatal, I agree with that but it shows just how far you will go! Now of course there are limits and boundaries to which you will need to be cautious of but what is love without risks? In fact what is life without risks? They need to be taken, it can strengthen love, it can also make you look a fool but then at least you know that you are brave enough to take the plunge, does that not inspire you?
When I mention risks, I don't mean go have an affair or cheat behind his/her back but I mean going to all lengths to show them that you are in it for real! It could be silly small risks, or big dangerous risks? Things like, moving in with them, isn't that a risk? You will be putting your love on the line that way, it could be make or break but at least you tried and gave it a chance, and if you're not ready you can bail out until you feel comfortable!
Another piece of advice, be their best friend above all else! Of course when you're upset you will normally run to your loved one first but normally your loved ones are pretty selfish and will only care about you and your wellbeing whilst a friend will tell you how it is, they would have always been there through all the girlfriends and boyfriends you've had. They would give you advice on how to do your hair at the Prom or Homecoming, they would tell you how to pull the new girl at high school, friends do these things. That's why its important to be their best friend first, they would be more comfortable in telling you their secrets that way, whereas with a loved one you are too scared to tell them something in case they get too worried! Be their best friend, understand their needs and wants, be truthful and honest with them, tell them when you think they're messing things up, tell them when they're not making the right decisions, reassure them that the decisions they make are right, be there for them, make them feel at home, be their support, their back-up, pick them up when they're down, bring them joy and smiles, bring them breakfast (LOL), do these small little things that best friends do for each other. Your best friend is silly with you. They make you laugh and act like right goofballs along with you, they don't let you do silly things alone! That's the most important thing in love, when you can call them your best friend , your soul mate, the person that mocks you and loves you and would do the world for you but not too much because they don't want you getting off your head!
That's my advice right there!