Here goes

So I have been in a relationship for the past 5 years now, we live together and have a cat (lol). We have been through hell and back in the past 5 years, things have only recently changed to sort of good? Well anyway, my ex boyfriend keeps texting me, messaging me on social media and I just dont know what to do? I mean I love my boyfriend who I am with now but you know my ex was literally my first ever proper love, we had amazing chemistry we were drawn to each other and still obviously are.... my head is all over the place. I never felt good enough for my ex when I was with him though and my boyfriend I am with now well he doesn't make me feel anything EVER! I want to live my life, go on holidays etc but is it strange I can only see that happening with my ex? My head is so sore from all this thinking.