The thing with with signs like this is that they can be interpreted in many ways. The only thing that matters is how you feel when they happen. Do seeing hearts make you feel good, then you are in alignment with what you want. You're doing great, stay happy :)
Signs are open to different interpretations depending on who sees them. For some, this can indeed be a sign that love is on the way, for others the fact these are single hearts are going to be significant. There really is no right or wrong when signs show up - its the power we give them that makes the different. A classic example is black cats. In UK, a black cat crossing your path is considered lucky. In the US its considered unlucky. Depending on who you speak to, they will tell you their interpretation of it.