Unless you’re already a celebrity or naturally secrete cologne out of your pores, you have to treat dating and relationships like it’s the only thing keeping you from death. Don’t be on time to s***, be an hour early. Don’t buy her a Kit-Kit bar, buy her a King Size Kit-Kat bar.
Whenever you think you’ve gotten her a nice gift, it’s not. Get her more. Always more. You need to have my mindset in that you’re always convinced she’s going to leave you. If not, and you have nothing to fear, you will lose her. Even if you love her, without fear, you have nothing to lose, and this is more scary than anything else. If you’re thinking about her, call her. If you’re not thinking about her, call her. If you’re asleep, call her. Better to by clingy than an asshole.
Of course, if you’re just starting to date someone it’s probably best to not call all the time. Maybe this is a good time to be a tad more arrogant and to prove your self worth or something. After she realizes how great you are, then you can be a little more modest, and settle down in a comfortable relationship. If you are an asshole, then hide it. Or at least hide it for a little while until the time is right to tell her. You’ll know when the time is. Maybe it’s while somebody cuts you off on the highway and she’s in the passenger’s seat, and she gives you a little nod signifying it’s time to unleash Road Hulk. If she’s comfortable with how much of a jerk you are, then the two of you are truly in love.
Of course, there will come a time when things will settle down, and the spark will fade a little. This is when divorces happen. That’s why you have to keep it up. Make it a routine to show her how much she means to you. Shower her with love, or with showers, because hygiene is important above all else.