You get butterflies in your stomach. When people first starting dating, you may hear them say they have butterflies in their stomach. The truth is that what they are experiencing is the jitters because, like the creatures themselves, butterflies take some time to develop. Even after you've dated someone for a long time and the jitters stop, the butterflies are still there. It's when they are no longer there that it's time to worry, but you know you're in love whenever they're around.

When you think about the future, you envision him/her in it. If someone asked you how you see your life in 5 or 10 years from now? What's the first thought that comes into your mind and, more importantly, who is there with you? If you foresee a future with your current partner, you may be in love.

After a difficult day, he/she makes everything seem better. Whether you've had a difficult day at work or just feel awful for whatever reason, your love interest should be able to make you forget about everything. If all of the bad goes right out the window when you're together, take comfort in knowing that you're in love.

You think of your sweetheart's needs before your own. Selflessness is one of the single best examples of love because it shows that you are putting the other person first. This doesn't mean that you forget about everything that's important to you, but it does mean that you keep your partner's interests at heart and always do what you can to make them happy.

Several days apart feel like an eternity. Do you miss your mate when work gets in the way or a vacation has the two of you temporarily apart? If you can't wait to get back just to hear their voice, see their smile or find out what he/she is doing, you're in love.

When you think of him/her or say their name, you can't stop smiling. Ok, this is the true test of love. How many times have you watched as people talk about their significant other and a smile suddenly crosses their face? When this happens, what do you think? It's obvious, they are in love with their mate and if you cannot stop smiling when speaking about your sweetheart, you too are in love.

You feel loved when you are together. What makes us fall in love with someone? Is it their kind heart, honesty or because we just feel unexplainably happy when together? One of the most attractive characteristics about someone is their ability to make us feel loved, cherished and appreciated. If you feel all of this when you are with your mate, love is definitely in the air.