My in-laws

My husband was married before to his childhood sweetheart, she cheated on him, left him and broke his heart. Now that he’s married again (to me) his family loves to bring up the fact that he’s been heart broken before and view me as “second” without realizing it they would make comments like “take care of him, don’t break his heart” and every time I talk to his mom on the phone she loves to bring up his past. For example, today, I was telling her about how my husband wants to get rid of his old broken furniture that’s falling apart that we kept for a while (that he also had with his ex) and she said “yeah, I know my son he wants to get rid of all of the old memories” when that’s not the case. I know that he doesn’t care about his past. It makes me laugh but sometimes I’m like “what the heck lol really?” I can’t help but feel second around his family and it’s very uncomfortable. I know where I stand in my relationship and I know my husband loves me and with no doubt I know I’m the best he’s ever had. But sometimes thoughts cross my mind and I’m turned off by everything and I feel like I deserve better than to feel second. I don’t think they understand that their son is a big boy now and what he had in the past was temporary. I mean he was only 19 when he got married and didn’t last for more than 2 years. Now that he’s 25 they still treat him like he belongs with his “first love” and that no one can ever break his heart except his first. I’ve heard comments and stories from his little sisters, father and mother. We’ve been married for a year and a half now and I can’t help but be turned off by him and his family when I’m around. What do you guys think of this? How do I deal with this? And how do I approach his family without disrespecting them?