My 25M boyfriend has been battling with ED and I 25F am starting to feel insecure

I’ve been dating my 25 yo boyfriend for 4 years, we started dating when we were 21. He was always the one to initiate sex in the past but the past year he’s been struggling with ED. We still have sex but it’s not all the time and he’s been begging me to be patient with him. I’m just so confused because I feel like this shouldn’t be happening at his age. I’m all up to being patient but at the same time I feel like I’m starting to lose interest and I haven’t had any sex drive at all. I’ve told him this and he keeps saying how all the stress he’s been dealing with and the fact that he’s overweight is the reason. He says he wants to lose weight and get therapy but I just can’t help but feel like this is my fault and that’s where all my insecurity is coming from. Am I right to be feeling insecure?<br><br>Edit: I’ve been trying to get him to go to the doctor for over a year now but he keeps making excuses. I’m seriously thinking of breaking up with him because I feel like he’s in denial and I just can’t wait any longer. I feel so terrible right now because I love him so much and I don’t want to leave him but I just can’t keep going like this.