<human>: I (25F) tend to get attached to guys who I'm physical with. I haven't had sex yet, but I've made out, had a guy touch/kiss my breasts, and given a handjob. 

I only started dating about 9 months ago, and so far, there have only been two guys that I've done anything physical with. I only gave a handjob to the second guy. 

The first guy (25M) got sick of waiting for me to get comfortable before proceeding to everything below the waist; he and I never got around to physical exclusivity or a relationship, and I didn't feel comfortable doing anything below the waist with him prior to those two things (physical exclusivity for handjobs/fingering and a relationship for blowjobs/sex). When he ended things with me, he said some really hurtful things about how I should go faster in the bedroom due to my age. 

With the second guy (27M), I decided go a bit faster physically. I felt comfortable enough to relax around him (with the first guy, I kept tensing up) so on the third date, I just went for it and gave him a handjob. He didn't know that I didn't have any experience with them, and I had no idea what I was doing so I'm sure it wasn't the best handjob he's ever gotten by any means. After I gave him a handjob, we were lying in his bed and talking and I asked him what he was looking for, and he mentioned that he wasn't sure if he wants a relationship or not and he's seeing multiple other girls at the moment. 

Anyways, since that date, he takes DAYS to respond when I send him a text, which wasn't the case before. It's very clear that he's not interested enough, and moving towards uninterested. I've only been on 3 dates with him, and I feel like I'm more emotionally invested than I should be, although I've been addressing this by (1) accepting he's not as interested as I would like him to be (2) deciding to go on a date with another guy this week.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: For future guys I casually date and decide to be physical with (at most, handjobs and fingering), how do you recommend not getting too emotionally invested too soon?