This dream is a projection of your real life. It means that your life is relatively comfortable (the part near the shore is very stable), but your heart is not calm, which means that your emotional life is relatively rich (the side near the sea will be very bumpy when the storm comes). Family members or people who care about you take good care of you (someone told you to come back to the shore if there is a storm)
The second part explains that when you meet a thing or a person and have to make some decisions, you are a little hesitant and the peace of life is broken. You can still see good results or hope in a little chaotic situation (if you find a partner, your family may disagree, but you finally give in, or your job changes, which looks bad, but the result is good), and finally you return to the quiet life in the past.