Loving my muscle gain but......

Oh my goodness I CANNOT fit into pants anymore 😂😂😂😂 put on a pair of pants I haven't worn since march that fit fine, to now being so tight on my legs and bum and loose on my waist haha. I was too scared to wear them because I didn't want to rip a hole in them 😂 Looks like I'm wearing leggings the rest of my life, what a shame 🤷🏼‍♀️ Now I'm gaining muscle it's like an addiction (a healthy one!) but man I cannot get my abs to fully make an appearance, anyone have any ab tips?! Lol